 | Sean O´Casey (1884-1964) |  1 |
| | Sinead O´Connor (1966-) |  1 |
| Patrick O´Duffy | 1 |
 | Frank O´Hara (1926-1966) | 1 |
| | Austin O´Malley (1858-1932) | 1 |
| | Alexander O´Neal (1953-) | 1 |
| P. J. O´Rourke | 2 |
| Chris O'Bannon | 3 |
| Randall K. O'Bannon | 3 |
| Julie O'Beirne | 3 |
| Francis O'Boy | 3 |
| Bill O'Boyle | 5 |
| James O'Boyle | 4 |
| Kerry O'Boyle | 8 |
| Robert O'Boyle | 2 |
| Tom O'Boyle | 2 |
| Doug O'Brey | 6 |
| Jamie O'Briant | 3 |
| Aidan O'Brien | 8 |
| Amy O'Brien | 3 |
| Andy O'Brien | 5 |
| Anthony O'Brien | 9 |
| Anthy O'Brien | 1 |
| Barbara O'Brien | 4 |
| Bart O'Brien | 3 |
| Becky O'Brien | 4 |
| Bill O'Brien | 10 |
| Bob O'Brien | 7 |
| Carol O'Brien | 1 |
| Charles O'Brien | 6 |
| Charlie O'Brien | 4 |
| Cheryl O'Brien | 5 |
| Chris O'Brien | 45 |
| Conan O'Brien | 15 66 |
| Conor Cruise O'Brien | 1 |
| Dan O'Brien | 112 |
| Daniel O'Brien | 3 |
| Danny O'Brien | 11 |
| Dave O'Brien | 6 |
| David O'Brien | 18 |
| Denis O'Brien | 4 |
| Dennis O'Brien | 9 |
| Dermot O'Brien | 2 |
| Dick O'Brien | 3 |
| Don O'Brien | 6 |
| Doug O'Brien | 3 |
| Douglas O'Brien | 3 |
| Ed O'Brien | 11 |
| | Edna O'Brien (1932-) | 13 |
| Elizabeth O'Brien | 4 |
| Fiona O'Brien | 3 |
| Flann O'Brien (1911-) | 6 |
| Frank M. O'Brien | 1 |
| Frank O'Brien | 3 |
| Heather O'Brien | 3 |
| Jack O'Brien | 4 |
| Jake O'Brien | 4 |
| James O'Brien | 12 |
| Jerry O'Brien | 3 |
| Jesse O'Brien | 2 |
| Jim O'Brien | 61 |
| Jimmy O'Brien | 2 |
| Joe O'Brien | 3 |
| John O'Brien | 46 |
| Julie O'Brien | 4 |
| Karen O'Brien | 2 |
| Kate O'Brien | 6 |
| Kathleen O'Brien | 9 |
| Katie O'Brien | 12 |
| Kelly O'Brien | 3 |
| Ken O'Brien | 10 |
| Kevin O'Brien | 9 |
| Kyle O'Brien | 6 |
| Larry O'Brien | 6 |
| Laura O'Brien | 2 |
| Margaret O'Brien | 8 |
| Mark O'Brien | 6 |
| Marty O'Brien | 2 |
| Mary O'Brien | 10 |
| Marybeth O'Brien | 4 |
| Mat O'Brien | 7 |
| Maureen O'Brien | 4 |
| Megan O'Brien | 5 |
| Melissa O'Brien | 5 |
| Michael O'Brien | 23 |
| Mike O'Brien | 33 |
| Miles O'Brien | 26 |
| Monica O'Brien | 3 |
| Morgan O'Brien | 5 |
| Pat O'Brien | 11 |
| Patricia O'Brien | 4 |
| Patrick O'Brien | 10 |
| Paul O'Brien | 13 |
| Peter O'Brien | 5 |
| Rachel O'Brien | 2 |
| Rich O'Brien | 2 |
| Richard O'Brien (1942-) | 6 |
| Rick O'Brien | 8 |
| Ron O'Brien | 9 |
| Ronnie O'Brien | 7 |
| Sandy O'Brien | 2 |
| Sean O'Brien | 21 |
| Shane O'Brien | 4 |
| Shannon O'Brien | 6 |
| Shawn O'Brien | 7 |
| Sheila O'Brien | 3 |
| Slade O'Brien | 10 |
| Soledad O'Brien (1966-) | 17 |
| Stephen O'Brien | 3 |
| Steve O'Brien | 7 |
| Supt O'Brien | 1 |
| Susan O'Brien | 7 |
| Terry O'Brien | 4 |
| Thomas O'Brien | 20 |
| Tim O'Brien | 42 |
| Tina O'Brien | 2 |
| Tom O'Brien | 128 |
| William O'Brien | 1 |
| Shanna O'Bright | 5 |
| Megan O'Bryan | 3 |
| Robbie O'Bryan | 3 |
| Eathan O'Bryant | 5 |
| Patrick O'Bryant | 32 |
| Cheryl O'Bryon | 2 |
| Angela O'Byrne | 3 |
| Dan O'Byrne | 3 |
| Demi O'Byrne | 3 |
| James O'Byrne | 6 |
| Justin O'Byrne | 2 |
| Mike O'Cain | 5 |
| Woody O'Cain | 4 |
| Chris O'Callaghan | 3 |
| Eoin O'Callaghan | 1 |
| Matthew O'Callaghan | 5 |
| Ryan O'Callaghan | 8 |
| Bill O'Callahan | 5 |
| Lloyd O'Carroll | 6 |
| | Sean O'Casey (1880-1964) | 2 26 |
| Margie O'Clair | 3 |
| Alyssa O'Connell | 3 |
| Beth O'Connell | 3 |
| Bill O'Connell | 4 |
| Brian O'Connell | 5 |
| Chris O'Connell | 1 |
| Dan O'Connell | 4 |
| Daniel O'Connell | 2 |
| David O'Connell | 6 |
| Jack O'Connell | 47 |
| | Jerry O'Connell (1974-) | 4 |
| Jim O'Connell | 9 |
| Jody O'Connell | 6 |
| John O'Connell | 43 |
| Johnny O'Connell | 5 |
| Katharine O'Connell | 1 |
| Katie O'Connell | 5 |
| Keelan O'Connell | 3 |
| Kelly O'Connell | 11 |
| Kevin O'Connell | 39 |
| Mark O'Connell | 3 |
| Marty O'Connell | 2 |
| Matthew O'Connell | 5 |
| Meg O'Connell | 3 |
| Megan O'Connell | 3 |
| Michael O'Connell | 5 |
| Mike O'Connell | 70 |
| Pat O'Connell | 4 |
| Paul O'Connell | 6 |
| Steve O'Connell | 2 |
| Suzanne O'Connell | 5 |
| Ted O'Connell | 2 |
| Thomas O'Connell | 3 |
| Tim O'Connell | 4 |
| Tom O'Connell | 12 |
| Tommy O'Connell | 3 |
| Will O'Connell | 3 |
| Pat O'Conner | 3 |
| Sandra Day O'Conner | 8 |
| Alison O'Connor | 4 |
| Barbara O'Connor (1928-) | 47 |
| Barry O'Connor | 3 |
| Ben O'Connor | 3 |
| Bob O'Connor | 7 |
| Brenda O'Connor | 5 |
| Brent O'Connor | 3 |
| Brian O'Connor | 107 |
| Brion O'Connor | 5 |
| Bryan O'Connor | 3 |
| Carroll O'Connor | 6 |
| Catherine O'Connor | 3 |
| Chris O'Connor | 12 |
| Creagh O'Connor | 5 |
| Dan O'Connor | 4 |
| Daniel O'Connor | 4 |
| David O'Connor | 8 |
| Dean O'Connor | 9 |
| Donald O'Connor (1925-) | 20 |
| Eileen J. O'Connor | 9 |
| Erinn O'Connor | 3 |
| | Flannery O'Connor | 7 23  7 |
| Frank O'Connor | 1 |
| Gail O'Connor | 4 |
| Garry O'Connor | 8 |
| George O'Connor | 6 |
| Gerald O'Connor | 2 |
| Greg O'Connor | 10 |
| Ian O'Connor | 5 |
| Jack O'Connor | 10 |
| James O'Connor | 2 |
| Jennifer O'Connor | 3 |
| Jim O'Connor | 14 |
| Joe O'Connor | 3 |
| John O'Connor | 34 |
| Joseph O'Connor | 5 |
| Kate O'Connor | 5 |
| Kevin O'Connor | 89 |
| Larry O'Connor | 1 |
| Mark O'Connor | 16 |
| Mary O'Connor | 4 |
| MaryAnn O'Connor | 2 |
| Matt O'Connor | 11 |
| Maura O'Connor | 4 |
| Michael O'Connor | 12 |
| Mike O'Connor | 29 |
| Monsignor Eugene O'Connor | 3 |
| Nancy O'Connor | 4 |
| Noel O'Connor | 5 |
| Paddy O'Connor | 2 |
| Pam O'Connor | 7 |
| Pat O'Connor | 18 |
| Patrick O'Connor | 9 |
| Paul O'Connor | 17 |
| Peter O'Connor | 3 |
| Ray O'Connor | 6 |
| Rick O'Connor | 3 |
| Rita O'Connor | 5 |
| Robert O'Connor | 8 |
| Ron O'Connor | 3 |
| Ryan O'Connor | 2 |
| Sean O'Connor | 8 |
| Shane O'Connor | 2 |
| Shawn O'Connor | 5 |
| | Sinead O'Connor (1966-) | 8 |
| Steve O'Connor | 9 |
| Ted O'Connor | 3 |
| Terry O'Connor | 5 |
| Thom O'Connor | 2 |
| Thomas O'Connor | 6 |
| Tim O'Connor | 13 |
| Tom O'Connor | 25 |
| Vicki O'Connor | 6 |
| Wade O'Connor | 5 |
| Darren O'Day | 7 |
| Jim O'Day | 8 |
| Ken O'Day | 4 |
| Kerri O'Day | 3 |
| Tim O'Day | 4 |
| Tim O'Dea | 2 |
| Bill O'Dell | 3 |
| Dan O'Dell | 12 |
| Dennis O'Dell | 12 |
| Digger O'Dell | 3 |
| Ed O'Dell | 4 |
| John O'Dell | 8 |
| Karen O'Dell | 4 |
| Katie O'Dell | 3 |
| Keltie O'Dell | 5 |
| Mike O'Dell | 9 |
| Nancy O'Dell (1966-) | 15 |
| Rich O'Dell | 3 |
| Ruth O'Dell | 3 |
| Spike O'Dell | 3 |
| Terry O'Dell | 3 |
| Marni Pont O'Doherty | 4 |
| Aaron O'Donnell | 3 |
| Anthony O'Donnell | 3 |
| Bill O'Donnell | 4 |
| Bob O'Donnell | 7 |
| Brett O'Donnell | 3 |
| Brian O'Donnell | 5 |
| Carolyn O'Donnell | 3 |
| Casey O'Donnell | 3 |
| Chris O'Donnell (1970-) | 6 |
| Chuck O'Donnell | 5 |
| Cyndi O'Donnell | 3 |
| Dave O'Donnell | 3 |
| David O'Donnell | 11 |
| Derrick O'Donnell | 4 |
| Edward O'Donnell | 9 |
| Erin O'Donnell | 6 |
| Eugene O'Donnell | 9 |
| Frank O'Donnell | 30 |
| Jim O'Donnell | 4 |
| Joe O'Donnell | 3 |
| John O'Donnell | 6 |
| Joseph O'Donnell | 3 |
| Kelly O'Donnell | 12 |
| Ken O'Donnell | 4 |
| Kevin O'Donnell | 29 |
| Larry O'Donnell | 1 |
| Lawrence O'Donnell | 4 |
| Lorraine O'Donnell | 6 |
| Michael O'Donnell | 3 |
| Mike O'Donnell | 20 |
| Molly O'Donnell | 9 |
| Niall O'Donnell | 3 |
| Pauline O'Donnell | 2 |
| Phil O'Donnell | 1 |
| Pierce O'Donnell | 7 |
| Richard O'Donnell | 5 |
| Rosie O'Donnell (1962-) | 35 |
| Ryan O'Donnell | 3 |
| Scott O'Donnell | 6 |
| Sean O'Donnell | 16 |
| Sharon O'Donnell | 4 |
| Terri O'Donnell | 3 |
| Theresa O'Donnell | 2 |
| Thomas O'Donnell | 5 |
| Tom O'Donnell | 9 |
| William O'Donnell | 7 |
| Joe O'Donoghue | 1 |
| John O'Donoghue | 6 |
| | Michael O'Donoghue (1940-1994) | 3 |
| Colin O'Donohoe | 2 |
| Brendan O'Donovan | 19 |
| Mark O'Donovan | 2 |
| Paul O'Donovan | 4 |
| Ron O'Dor | 4 |
| Dan O'Dowd | 55 |
| George O'Dowd | 2 |
| Niall O'Dowd | 4 |
| Brian O'Driscoll | 25 |
| Mike O'Driscoll | 1 |
| Sean O'Driscoll | 1 |
| Brian O'Dwyer | 2 |
| Conor O'Dwyer | 4 |
| Janis O'Dwyer | 8 |
| Peter O'Dwyer | 1 |
| Dan O'Fallon | 3 |
| Nuala O'Faolain | 3 |
| | Sean O'Faolain (1900-1991) | 1 1 |
| Michael O'Farrell | 7 |
| Mike O'Farrell | 1 |
| Liam O'Flaherty (1896-) | 2 |
| Bridget O'Flynn | 1 |
| Gardy O'Flynn | 3 |
| Justine O'Flynn | 2 |
| John O'Gara | 4 |
| Mike O'Gara | 2 |
| Ronan O'Gara | 4 |
| Colm O'Gorman | 3 |
| Dermot O'Gorman | 1 |
| Ed O'Gorman | 6 |
| Frank O'Gorman | 3 |
| Kevin O'Gorman | 2 |
| Martha O'Gorman | 2 |
| Robert O'Gorman | 3 |
| Bill O'Grady | 109 |
| Brian O'Grady | 5 |
| Catherine O'Grady | 4 |
| Christine O'Grady | 4 |
| George O'Grady | 16 |
| John O'Grady | 5 |
| Lynn O'Grady | 3 |
| Mac O'Grady (1951-) | 2 |
| Niall O'Grady | 4 |
| Paul O'Grady (1955-) | 8 |
| Roisin O'Grady | 1 |
| Sean O'Grady | 2 |
| Standish O'Grady | 1 |
| Stephen O'Grady | 21 |
| Tom O'Grady | 5 |
| Brian O'Green | 4 |
| Gary O'Hagan | 4 |
| Madalyn Murray O'Hair | 8 |
| Sean O'Hair | 16 |
| Neal O'Haire | 7 |
| Doug O'Halloran | 3 |
| Michael O'Halloran | 3 |
| Paul O'Halloran | 3 |
| Tim O'Halloran | 2 |
| Eunan O'Halpin | 4 |
| P.K. O'Handley | 8 |
| Fran O'Hanlon | 13 |
| Michael O'Hanlon | 95 |
| Paul O'Hanlon | 4 |
| Shannon O'Hanlon | 3 |
| Brian O'Hara | 8 |
| Catherine O'Hara (1954-) | 1 |
| Frank O'Hara | 1 6  1 |
| Jerry O'Hara | 5 |
| Jim O'Hara | 10 |
| John O'Hara | 13 |
| Katlin O'Hara | 4 |
| Kevin O'Hara (1969-) | 12 |
| Michael O'Hara | 7 |
| Mike O'Hara | 5 |
| Patrick O'Hara | 5 |
| Ryan O'Hara | 3 |
| Scarlett O'Hara | 1 |
| Shaun O'Hara | 45 |
| Steve O'Hara | 9 |
| Todd O'Hara | 2 |
| Vince O'Hara | 3 |
| Bill O'Hare | 3 |
| Brian O'Hare | 3 |
| Carole O'Hare | 4 |
| Don O'Hare | 3 |
| Kevin O'Hare | 3 |
| Michael O'Hare (1952-) | 10 |
| Michelle O'Hare | 2 |
| Mike O'Hare | 12 |
| Sarah O'Hare (1972-) | 1 |
| Tom O'Hare | 7 |
| Bonnie O'Hearn | 2 |
| Chris O'Hearn | 17 |
| Eric O'Hearn | 3 |
| Nick O'Heran | 3 |
| Nick O'Hern | 12 |
| Tim O'Hern | 1 |
| Ken O'Hollaren | 3 |
| Trevor O'Hoy | 8 |
| John O'Hurley (1956-) | 13 |
| Cori O'Kane | 3 |
| Margaret E. O'Kane | 6 |
| Andrew O'Keefe | 7 |
| Brian O'Keefe | 7 |
| Cathy O'Keefe | 2 |
| Dennis O'Keefe | 5 |
| Georgia O'Keefe | 2 |
| Jack O'Keefe | 5 |
| Jodi Lyn O'Keefe | 4 |
| Joe O'Keefe | 7 |
| John O'Keefe | 2 |
| Ken O'Keefe | 3 |
| Mary O'Keefe | 1 |
| Pat O'Keefe | 9 |
| Patrick F. O'Keefe | 1 1 |
| Peter O'Keefe | 3 |
| Sean O'Keefe | 35 |
| Shannon O'Keefe | 3 |
| Tom O'Keefe | 5 |
| William O'Keefe | 4 |
| Georgia O'Keeffe | 26 |
| Monsignor Richard O'Keeffe | 3 |
| Detective Dean O'Kelley | 3 |
| Ciaran O'Kelly | 4 |
| Morton O'Kelly | 3 |
| Peter O'Kelly | 15 |
| Jerald O'Kennard | 5 |
| Timothy O'Laughlin | 4 |
| Mike O'Lear | 3 |
| Amanda O'Leary | 2 |
| Bill O'Leary | 4 |
| Bob O'Leary | 3 |
| Chuck O'Leary | 4 |
| David O'Leary | 86 |
| Dermot O'Leary (1973-) | 5 |
| Eddie O'Leary | 3 |
| George O'Leary | 25 |
| Jack O'Leary | 1 |
| Jim O'Leary | 3 |
| June O'Leary | 3 |
| Kevin O'Leary | 7 |
| Michael O'Leary | 44 |
| Pat O'Leary | 4 |
| Peter O'Leary | 4 |
| Tim O'Leary | 4 |
| Tom O'Leary | 1 |
| Ed O'Lenic | 5 |
| Eddie O'Loughlin | 1 |
| Kevin O'Loughlin | 2 |
| Michael O'Loughlin | 3 |
| Rob O'Loughlin | 4 |
| Liam O'Mahony | 2 |
| Austin O'Malley | 9 43 3 |
| Bill O'Malley | 8 |
| Brigid O'Malley | 5 |
| Cardinal O'Malley | 2 |
| Chris O'Malley | 3 |
| Christine O'Malley | 4 |
| David O'Malley | 3 |
| Edward O'Malley | 3 |
| John O'Malley | 10 |
| Kaitlin O'Malley | 4 |
| Kathleen O'Malley | 7 |
| Mark O'Malley | 7 |
| Martin O'Malley | 8 |
| Mike O'Malley | 7 |
| Pat O'Malley | 3 |
| Sean O'Malley | 3 |
| Stephanie O'Malley | 2 |
| Tara O'Malley | 5 |
| Thomas O'Malley | 3 |
| Tim O'Malley | 22 |
| Tom O'Malley | 1 |
| V. Grady O'Malley | 4 |
| Frank O'Mara | 3 |
| Mike O'Mara | 4 |
| Ryan O'Marra | 18 |
| Robert O'Meally | 4 |
| Donald O'Meara | 7 |
| Evan O'Meara | 3 |
| John O'Meara | 3 |
| Kelly O'Meara | 14 |
| Kevin O'Meara | 2 |
| Mark O'Meara (1957-) | 22 |
| Molly O'Meara | 3 |
| Peter O'Meara (1969-) | 9 |
| Ryan O'Meara | 9 |
| Sue O'Meara | 2 |
| Mark O'Meley | 4 |
| Christine O'Neal | 3 |
| Dave O'Neal | 16 |
| Deltha O'Neal | 12 |
| Fred O'Neal | 9 |
| Jamario O'Neal | 3 |
| Jermaine O'Neal | 181 |
| Jim O'Neal | 9 |
| Jody O'Neal | 9 |
| Laura O'Neal | 4 |
| Mark O'Neal | 66 |
| Paul O'Neal | 1 |
| Paula O'Neal | 2 |
| Rodney O'Neal | 4 |
| RT O'Neal | 2 |
| | Ryan O'neal (1941-) | 1 1 1 |
| Scott O'Neal | 3 |
| Sean O'Neal | 1 |
| | Shaquille O'Neal (1972-) | 284 |
| Stan O'Neal | 4 |
| Stanley O'Neal | 4 |
| Tiffani O'Neal | 3 |
| Tim O'Neal | 8 |
| Brian O'Neil | 4 |
| Buck O'Neil (1911-) | 18 |
| Chris O'Neil | 7 |
| Erin O'Neil | 4 |
| Gary O'Neil | 4 |
| John O'Neil | 21 |
| Mark O'Neil | 1 |
| Pat O'Neil | 4 |
| Patrick O'Neil | 3 |
| Paul O'Neil | 9 |
| Pierce O'Neil | 2 |
| Richard O'Neil | 3 |
| Robert O'Neil | 4 |
| Sally O'Neil | 2 |
| Steve O'Neil | 3 |
| Terry O'Neil | 11 |
| Thomas O'Neil | 3 |
| Tim O'Neil | 1 |
| Tom O'Neil | 86 |
| William O'Neil | 2 |
| Alma O'Neill | 4 |
| Barry O'Neill | 3 |
| Bill O'Neill | 20 |
| Brad O'Neill | 3 |
| Brian O'Neill | 51 |
| Buck O'Neill | 5 |
| Carlotta Monterey O'Neill | 1 |
| Dan O'Neill | 1 |
| Dave O'Neill | 9 |
| Debby O'Neill | 3 |
| Dennis O'Neill | 3 |
| Donal O'Neill | 1 |
| Doug O'Neill | 45 |
| | Ed O'Neill (1946-) | 1 3 |
| Eileen O'Neill | 3 |
| Eoghan O'Neill | 2 |
| Eugene O'Neill | 4 23 1 |
| Jack O'Neill | 9 |
| James O'Neill | 2 |
| Jane O'Neill | 2 |
| Jeff O'Neill | 37 |
| Jim O'Neill | 36 |
| Joan O'Neill | 5 |
| John O'Neill | 45 |
| Jonjo O'Neill | 4 |
| Joseph O'Neill | 2 |
| Kevin O'Neill | 12 |
| Kristen O'Neill | 21 |
| Mark O'Neill | 3 |
| Martin O'Neill | 27 |
| Michael O'Neill | 2 |
| Mike O'Neill | 3 |
| Molly O'Neill | 1 |
| Nicholas O'Neill | 4 |
| Pat O'Neill | 5 |
| Patrick O'Neill | 6 |
| Paul O'Neill | 92 |
| Peggy O'Neill | 4 |
| Robert O'Neill | 2 |
| Sean O'Neill | 9 |
| Susie O'Neill | 3 |
| Ted O'Neill | 3 |
| Terry O'Neill | 4 |
| Tim O'Neill | 13 |
| Tom O'Neill | 14 |
| William O'Neill | 11 |
| Tim O'Pry | 2 |
| Danny O'Quinn | 5 |
| Harry O'Quinn | 3 |
| John O'Quinn | 4 |
| Terry O'Quinn (1952-) | 4 |
| Stephen O'Rahilly | 2 |
| Beau O'Reilly | 4 |
| Bill O'Reilly | 71 |
| Brian O'Reilly | 19 |
| Dave O'Reilly | 10 |
| David J. O'Reilly | 4 |
| David O'Reilly | 21 |
| Dennis O'Reilly | 3 |
| Ed O'Reilly | 1 |
| Francis O'Reilly | 2 |
| Gavin O'Reilly | 4 |
| Irish O'Reilly | 5 |
| James O'Reilly | 3 |
| Jim O'Reilly | 3 |
| | John Boyle O'Reilly (1844-1890) | 8 |
| Mayor Michael O'Reilly | 27 |
| Mike O'Reilly | 4 |
| Nathan O'Reilly | 2 |
| Norman O'Reilly | 3 |
| Phil O'Reilly | 3 |
| Sandra O'Reilly | 4 |
| Thomas O'Reilly | 3 |
| Tim O'Reilly | 21 |
| Tom O'Reilly | 4 |
| Valli O'Reilly | 1 |
| William O'Reilly | 4 |
| Christopher O'Riley | 3 |
| Dolores O'Riordan (1971-) | 3 |
| Aidan O'Rourke | 1 |
| Brian O'Rourke | 12 |
| Brianne O'Rourke | 9 |
| Dan O'Rourke | 3 |
| Jim O'Rourke (1969-) | 3 |
| John O'Rourke | 12 |
| Melissa O'Rourke | 3 |
| Michael O'Rourke | 1 |
| Norma O'Rourke | 3 |
| Norman O'Rourke | 12 |
| | P. J. O'Rourke (1947-) | 15 68 3 10 |
| Rep. Beto O'Rourke | 6 |
| Ronald O'Rourke | 5 |
| Teresa O'Rourke | 3 |
| Tim O'Rourke | 3 |
| Tom O'Rourke | 5 |
| Tony O'Rourke | 3 |
| William O'Rourke | 2 |
| Dan O'Shaughnessy | 3 |
| James O'Shaughnessy | 12 |
| Bill O'Shea | 4 |
| Conor O'Shea | 1 |
| Dan O'Shea | 3 |
| Dennis O'Shea | 4 |
| Jack O'Shea | 7 |
| James O'Shea | 7 |
| John O'Shea | 15 |
| Kevin O'Shea | 7 |
| Martin O'Shea | 5 |
| Meghan O'Shea | 4 |
| Mike O'Shea | 2 |
| Tara O'Shea | 5 |
| Tim O'Shea | 23 |
| Tom O'Shea | 3 |
| Shaemas O'Sheel (1886-) | 1 |
| Steve O'Steen | 4 |
| Barry O'Sullivan | 7 |
| David O'Sullivan | 1 |
| Eddie O'Sullivan | 58 |
| Edmund O'Sullivan | 3 |
| Jacqui O'Sullivan | 1 |
| James O'Sullivan (1944-) | 22 |
| Jim O'Sullivan | 49 |
| John O'Sullivan | 4 |
| Joseph O'Sullivan | 4 |
| Kevin O'Sullivan | 2 |
| Michael O'Sullivan | 27 |
| Mike O'Sullivan | 2 |
| Patrick O'Sullivan | 6 |
| Paul O'Sullivan | 11 |
| Peter O'Sullivan | 2 |
| Philip O'Sullivan | 2 |
| Ronnie O'Sullivan | 31 |
| Sonia O'Sullivan | 4 |
| Stephen O'Sullivan | 4 |
| Terence M. O'Sullivan | 3 |
| Terry O'Sullivan | 8 |
| Tim O'Sullivan | 8 |
| Jane O'Tiernan | 3 |
| Bobby O'Toole | 4 |
| Fintan O'Toole | 6 |
| Jeffrey O'Toole | 2 |
| John O'Toole | 11 |
| Kathleen O'Toole | 4 |
| Larry O'Toole | 4 |
| Marty O'Toole | 2 |
| Pat O'Toole | 6 |
| Peter O'Toole | 2 |
| Randal O'Toole | 2 |
| Tara O'Toole | 7 |
| Teri O'Toole | 3 |
| Tim O'Toole | 28 |
| Paddy O'Wagon | 2 |
| Frederick Oakeley | 1 |
| Paul Oakenfold (1963-) | 3 |
| Andrea Oakes | 3 |
| Brian Oakes | 4 |
| Jeannie Oakes | 4 |
| Jim Oakes | 4 |
| Julie Oakes | 3 |
| Peter Oakes | 1 |
| Wayne Oakes | 12 |
| Michael Oakeshott | 2 |
| Bob Oakland | 3 |
| Mike Oakland | 4 |
| Ann Oakley | 8 |
| Annie Oakley (1860-) | 1 |
| Chris Oakley | 3 |
| Corey Oakley | 3 |
| Ed Oakley | 18 |
| Jan Oakley | 2 |
| Joyce Oakley | 3 |
| Margie Oakley | 5 |
| Phyllis Oakley | 4 |
| Robert Oakley | 7 |
| Robin Oakley | 51 |
| Brandy Oaks | 3 |
| Clete Oaks | 7 |
| David Oaks | 4 |
| John Oaks | 1 |
| Larry Oaks | 2 |
| Monte Oaks | 3 |
| Russ Oaks | 7 |
| Ursula Oaks | 3 |
| Chris Oarr | 1 |
| Mark Oaten | 20 |
| Chief Daniel Oates | 3 |
| Gloria Oates | 3 |
| | John Oates (1949-) | 18 |
| Johnny Oates | 3 |
| | Joyce Carol Oates (1938-) | 2 35 |
| Sam Oates | 2 |
| Kathy Oatis | 3 |
| Nate Oats | 5 |
| Alan Oatsvall | 3 |
| Donna Oba | 3 |
| Nawaf Obaid | 17 |
| Barack Obama | 132 |
| Enrique Obando | 2 |
| Eva Obarzanek | 6 |
| Olusegun Obasanjo | 56 |
| Hiroshi Obayashi | 1 |
| Lt. Henry Obbo | 3 |
| Sarah Obeid | 2 |
| Roman Oben | 20 |
| Jim Oberdorf | 9 |
| Peter Oberdorfer | 3 |
| James Oberg | 1 |
| Lyle Oberg | 4 |
| Roger Oberg | 6 |
| Don Oberhelman | 4 |
| Doug Oberhelman | 1 |
| Lori Oberhofer | 1 |
| Aaron Oberholser | 5 |
| Arron Oberholser | 38 |
| Chad Oberholtzer | 7 |
| Dave Oberle | 4 |
| Sylvia Oberle | 3 |
| Kurt Oberloh | 3 |
| Michelle Oberman | 3 |
| Miller Oberman | 3 |
| Rene Obermann | 2 |
| Jon Obermoller | 5 |
| Merle Oberon (1911-) | 1 |
| Betsy Oberst | 3 |
| | Conor Oberst | 45 |
| Mark Oberst | 3 |
| James Oberstar | 14 |
| Abby Oberthier | 2 |
| Fabricio Oberto | 11 |
| Brad Oberwager | 1 |
| James Oberweis | 2 |
| Jim Oberweis | 32 |
| Craig Obey | 5 |
| David Obey | 45 |
| Brian Obie | 3 |
| Brane Oblak | 2 |
| Diana Oblinger | 6 |
| Ben Obomanu | 16 |
| Miria Kalule Obote | 7 |
| Zeljko Obradovic | 5 |
| Jeff Obrecht | 2 |
| Daniel Obremski | 3 |
| Mark Obrinsky | 7 |
| Dave Obrzut | 3 |
| Lukasz Obrzut | 9 |
| Etorres observation | 1 |
| Charlotte Observer | 11 |
| Sigbjorn Obstfelder (1866-1900) | 4 4 |
| Michael Obuchowski | 7 |
| Joe Obucina | 2 |
| Henry Obwocha | 2 |
| Abdullah Ocalan | 14 |
| Satur Ocampo | 4 |
| Ric Ocasek (1949-) | 20 |
| Jan Occhi | 8 |
| Billy Ocean | 1 |
| Ana Gabriela Ocejo | 3 |
| J. C. och A. W. Hare | 1 |
| Frank Ochberg | 3 |
| Joe Ocheltree | 3 |
| Koji Ochiai | 2 |
| Isabella Ochichi | 3 |
| Joseph Ochieno | 3 |
| B.L. Ochman | 1 |
| Phoebe Ochman | 3 |
| Bernie Ochoa | 5 |
| Ellen Ochoa | 6 |
| Jeannie Ochoa | 3 |
| Jose Ochoa | 3 |
| Juan Ochoa | 4 |
| Lorena Ochoa | 61 |
| Nadia Ochoa | 3 |
| Rick Ochoa | 4 |
| Elli Ochowicz | 5 |
| | Adolph S. Ochs (1858-1935) | 2 |
| Millard Ochs | 3 |
| Paul Ochs | 2 |
| Phil Ochs (1940-) | 16 |
| Roger Ochs | 3 |
| Sylvia Ochs | 6 |
| Tom Ochsenschlager | 6 |
| Simon Ockley | 1 |
| Constantin Oclei | 5 |
| Adrian Ocneanu | 2 |
| Michael Ocrant | 3 |
| Miguel Octavio | 3 |
| Dane Oda | 3 |
| Hirofumi Oda | 3 |
| Hiroyuki Oda | 3 |
| Nobunari Oda | 2 |
| Shavo Odadjian (1974-) | 13 |
| Naoto Odagiri | 3 |
| Curtis Oddo | 2 |
| Governor David Oddsson | 3 |
| Viola Odebrecht | 3 |
| Brodie Odegaard | 3 |
| Kristen Odegaard | 1 |
| Abdullah Odeh | 1 |
| Ty Odeh | 3 |
| Rich Odell | 2 |
| Zach Odell | 6 |
| Burt Odelson | 7 |
| Thomas L. Odem, Jr | 2 |
| Greg Oden | 31 |
| Rod Oden | 5 |
| Ron Oden | 9 |
| Terry Oden | 2 |
| Eva Odenahl | 1 |
| Eva Odendahl | 2 2 |
| Michel Odent | 1 |
| Monsignor Slawomir Oder | 7 |
| Paul Odera | 2 |
| Don Odermann | 3 |
| Clifford Odets (1906-) | 5 |
| Chrispin Odhiambo | 1 |
| Jared Odhiambo | 1 |
| Julie Odil | 7 |
| Raila Odinga | 14 |
| Mike Odinwaller | 3 |
| Cesar Odio | 2 |
| George Odiorne | 1 |
| Steve Odland | 12 |
| Tor Odland | 7 |
| Bob Odom | 13 |
| Dave Odom | 286 |
| Jereme Odom | 4 |
| Lamar Odom | 97 |
| Laura Odom | 1 |
| Mary Odom | 3 |
| Rep. Gary Odom | 3 |
| Wendell Odom | 6 |
| Laura Odorczyk | 4 |
| Jason Odorizzi | 3 |
| John Odrechowski | 5 |
| Steve Odson | 3 |
| Nelson Oduber | 4 |
| Doug Odum | 4 |
| Marvin E. Odum | 2 |
| Thomas Odundo | 2 |
| Roger von Oech | 14 |
| Raymond Oechsle | 3 |
| Rick Oefinger | 1 |
| Adam Oehlenschläger (1779-1850) | 3 3 |
| Tim Oelgoetz | 3 |
| Arnie Oelke | 3 |
| Dwight Oelke | 3 |
| Ivan Oelrich | 7 |
| Rob Oertel | 5 |
| Al Oerter (1936-) | 8 |
| George Oerther | 3 |
| Larry Oertle | 3 |
| Dawn Oesch | 2 |
| Syarif Oesman | 1 |
| Bill Oesterle | 3 |
| Dean Oestreich | 8 |
| Steve Oestreicher | 7 |
| Friedrich Christoph Oetinger | 1 |
| Brick Oettinger | 3 |
| Marion Oettinger | 5 |
 | Saint Peter of Alcantara (1499-1562) | 1 |
| St. Francis of Assisi | 32 |
| Joseph II of Austria | 1 |
| | St. Teresa of Avila (1515-1582) | 3 36 |
| Lord Patten of Barnes | 1 |
 | Mother Teresa of Calcutta (1910-1997) | 3 103 |
| King Farouk of Egypt | 1 |
| Elizabeth I Of England | 4 |
| James I of England (1566-1625) | 3 |
| Lord Thomson of Fleet | 2 |
| Louis XVIII of France | 2 |
| Queen Liliuokalani of Hawaii | 1 |
| King Abdullah of Jordan | 4 |
| Princess Michael Of Kent | 1 |
| | Saint Ignatius of Loyola (1491-1556) | 9 |
| The Wizard of Oz | 41 |
| King Stanislaus of Poland | 2 |
| Prince Charles of Prussia | 1 |
 | Queen Marie of Romania (1875-1938) | 2 |
 | Alexander II of Russia (1818-1881) | 1 |
| St. Catherine of Siena | 2 |
| Isabella I of Spain | 1 |
| Oscar II of Sweden | 2 |
| St. John of the Cross | 13 |
| Queen Juliana of the Netherlands | 1 |
| First Lady Of The United States | 1 |
| Ginalyn Ofamin | 5 |
| Joshua Ofedie | 2 |
| Dr. Eli Ofer | 3 |
| Idan Ofer | 4 |
| Todd Offenbacher | 2 |
| Raymond Offenheiser | 6 |
| Matt Offerman | 2 |
| Taiwan Affairs Office | 1 |
| Dr. Garth Officer | 1 |
| Jill Officer | 7 |
| Paul Offit | 11 |
| Chigozie Offor | 2 |
| Willie Offord | 3 |
| Svenska OffroadEntusiasterna | 37 |
| Ed Offterdinger | 1 |
| Jean Offutt | 5 |
| Abah Ofon | 2 |
| Kwesi Ofori | 3 |
| Rene E. Ofreneo | 4 |
| Jay Ofsanik | 6 |
| Lars Oftedal d.y (1939-) | 1 1 |
| James Ofunyi | 1 |
| Stuart og Linda MacFarlane | 2 2 |
| Asbjørnsen og Moe | 1 1 |
| Daniel Ogan | 1 |
| Satoru Ogasawara | 17 |
| Sadako Ogata | 12 |
| Koichi Ogawa | 12 |
| Takahira Ogawa | 3 |
| Solomon Ogba | 1 |
| Okechi Ogbuokiri | 2 |
| Joyce Ogburn | 4 |
| Robert Ogburn | 3 |
| Amanda Ogden | 3 |
| Bud Ogden | 19 |
| Chief Gary Ogden | 5 |
| Clay Ogden | 12 |
| Cynthia Ogden | 12 |
| David Ogden | 9 |
| Frank Ogden | 3 |
| Howard Ogden | 3 |
| Jonathan Ogden | 11 |
| Karen Ogden | 1 |
| Mark Ogden | 4 |
| Mike Ogden | 2 |
| Roger Ogden | 4 |
| Scott Ogden | 5 |
| Stephen Ogden | 3 |
| Steve Ogden | 5 |
| Tanner Ogden | 2 |
| Vladimir Oge | 3 |
| Richard Ogesare | 3 |
| Bill Ogg | 3 |
| Kim Ogg | 3 |
| Nate Ogg | 3 |
| Mark Oggel | 3 |
| John Oghalai | 1 |
| Hank Ogilby | 4 |
| Donald Ogilvie | 4 |
| Dr. Gregory Ogilvie | 3 |
| Joe Ogilvie | 4 |
| | David Ogilvy (1911-1999) | 7 89 3 |
| Geoff Ogilvy | 55 |
| Tatsuko Ogino | 3 |
| Sean Ogirri | 7 |
| Satoshi Ogiso | 6 |
| Gina Ogle | 3 |
| Greg Oglesby | 18 |
| Lane Oglesby | 3 |
| Taylor Oglesby | 2 |
| Charles Ogletree | 13 |
| David Oglivy | 1 |
| Randy Ognibene | 4 |
| Dave Ogrean | 9 |
| Eric Ogren | 3 |
| John Ogren | 1 |
| Steve Ogrizovic | 3 |
| Chamberlain Oguchi | 17 |
| Adewale Ogunleye | 47 |
| Lekan Oguntoyinbo | 7 |
| Andrew Oh | 5 |
| Kevin Oh | 5 |
| Minya Oh | 10 |
| Sadaharu Oh | 119 |
| Yang Lim Oh | 1 |
| Kazuaki Oh'e | 7 |
| Uzo Ohaebosim | 4 |
| Dr. Kirk Ohanian | 2 |
| Susan Ohanian | 2 |
| Rosemarie Ohar | 2 |
| Chikai Ohazama | 4 |
| Bill Ohde | 5 |
| Uche Ohia | 4 |
| Tomo Ohka | 5 |
| Mark Ohlau | 5 |
| Nicole Ohlde | 8 |
| Tim Ohlde | 1 |
| Joerg Ohle | 2 |
| William Ohlemeyer | 5 |
| Justin Ohlemiller | 7 |
| Neal Von Ohlen | 2 |
| Ross Ohlendorf | 2 |
| Dianna Ohling | 2 |
| Don Ohlmeyer | 8 |
| Garrick Ohlsson | 5 |
| Mattias Ohlund | 12 |
| Lars Ohly | 3 |
| Paul Ohm | 1 |
| Chris Ohman | 3 |
| Ingrid Ohman | 1 |
| Mandy Ohman | 5 |
| Will Ohman | 5 |
| Keisuke Ohmori | 5 |
| Apolo Anton Ohno | 42 |
| Apolo Ohno | 23 |
| Miyoko Ohno | 2 3 |
| Yoshinori Ohno | 9 |
| Yuki Ohno | 2 |
| Tatsuya Ohtawa | 1 |
| Christine Ohuruogu | 5 |
| Fred Oien | 5 |
| Kai Oistamo | 3 |
| Ziad Ojakli | 2 |
| Tero Ojanpera | 4 |
| Ed Ojdana | 2 |
| Alison Ojeda | 6 |
| Augie Ojeda | 3 |
| Miguel Ojeda | 9 |
| Sandy Ojeda | 3 |
| Richa Ojha | 1 |
| Tom Ojienda | 5 |
| Oyom Ojo | 1 |
| Marie Okabe | 21 |
| Takanobu Okabe | 4 |
| Akinobu Okada | 7 |
| Katsuya Okada | 39 |
| Takeshi Okada | 4 |
| Yasushi Okada | 3 |
| Emeka Okafor | 31 |
| Emile Okal | 4 |
| Talal Okal | 2 |
| Frank Okam | 6 |
| Allen Okamoto | 2 |
| Gerald Okamoto | 6 |
| Kazuo Okamoto | 4 |
| Masayoshi Okamoto | 31 |
| Ron Okamoto | 8 |
| Yoshihisa Okamoto | 25 |
| Yoshitaka Okamoto | 1 |
| Jim Okamura | 2 |
| Steve Okamura | 7 |
| Tadashi Okamura | 2 |
| Atsuko Okano | 2 |
| Daisy Okas | 4 |
| Russell Okata | 1 |
| Shigenori Okazaki | 4 |
| Tomomi Okazaki | 3 |
| Lavon Oke | 3 |
| Chike Okeafor | 17 |
| Ade Okelarin | 4 |
| Stuart Oken | 4 |
| Kele Okereke | 4 |
| Markus Okeson | 4 |
| David Okeyo | 6 |
| Benjamin Okeyre | 3 |
| Lars Okholm | 1 |
| Dean Okimoto | 3 |
| Stuart Okin | 1 |
| Councilman Gary Okino | 6 |
| Ben Okiwe | 3 |
| Jens Okking | 1 1 |
| Ike Okoli | 2 |
| Andrea Okomski | 4 |
| Masao Okonogi | 3 |
| Onyeka Okoroafor | 1 |
| Dr. Corann Okorodudu | 3 |
| Alex Okosi | 2 |
| Christian Okoye | 2 |
| Mary Okoye | 4 |
| Justin Okpara | 3 |
| Daniel Okrent | 2 |
 | Ben Okri (1959-) | 1 31 |
| Art Oksuita | 3 |
| Jan Oksum | 2 |
| Vino Oktavia | 1 |
| Kutluk Oktay | 1 |
| Chris Okubo | 1 |
| Janice Okubo | 3 |
| Tracy Okubo | 4 |
| Watson Okubo | 15 |
| Hiroshi Okuda | 10 |
| Lee Okuja | 3 |
| Reagan Okumu | 2 |
| Natsumi Okumura | 1 |
| Yoshihiro Okumura | 3 |
| Noam Okun | 2 |
| George Okungu | 3 |
| Mehmet Okur | 19 |
| Mikel Olaciregui | 5 |
| Helen Olafsdottir | 19 |
| Chanaka Olagama | 3 |
| Andrew Olaharski | 5 |
| Sam Olajubutu | 7 |
| Hakeem Olajuwon (1963-) | 6 |
| Joseph Olander | 2 |
| Kolawole Olaniyan | 14 |
| Steve Olanoff | 3 |
| Cosmin Olaroiu | 9 |
| Marvin Olasky | 4 |
| Babatunde Olatunji | 1 |
| Kong Olav V | 1 1 |
| Henry Olawoye | 2 |
| Meg Olberding | 4 |
| Merle Olberding | 22 |
| Keith Olbermann (1959-) | 31 |
| Cindy Olczyk | 2 |
| Ed Olczyk | 7 |
| Eddie Olczyk | 54 |
| Mike Old | 2 |
| Dori Oldaker | 3 |
| Missy Oldaker | 2 |
| Chet Oldakowski | 1 |
| John Oldani | 3 |
| Claes Oldenburg (1929-) | 2 3 |
| Henrik Oldenburg | 1 |
| Mark Oldendorf | 2 |
| Aaron Oldfield | 7 |
| Andy Oldfield | 3 |
| | Bruce Oldfield (1950-) | 4 |
| Mike Oldfield (1953-) | 1 |
| Jeff Oldham | 4 |
| John Oldham | 9 |
| Kennette Oldham | 3 |
| Mike Oldham | 3 |
| Roland Oldham | 2 |
| Todd Oldham | 15 |
| Will Oldham | 7 |
| | Gary Oldman (1958-) | 4 |
| Mark Oldman | 7 |
| Sarah Oldmixon | 3 |
| Chanita Olds | 7 |
| Dale Olds | 2 |
| Dan Olds | 4 |
| Kris Olds | 2 |
| Sue Olds | 5 |
| Matt Olear | 5 |
| Juerg Oleas | 2 |
| Matt Olejnik | 2 |
| Gary Olenkiewicz | 2 |
| J. Renn Olenn | 3 |
| Sam Olens | 5 |
| Chris Olert | 2 |
| John Olerud | 22 |
| Eric Olesen | 4 |
| James Oleske | 3 |
| Mike Oleskow | 3 |
| Bob Oleson | 2 |
| Kathy Oleson | 2 |
| Rostislav Olesz | 5 |
| Ally Olewine | 4 |
| Larisa Oleynik (1981-) | 11 |
| Dmitry Oleynikov | 7 |
| Estella Olguin | 13 |
| Roger Olguin | 2 |
| Schelley Olhava | 16 |
| Khadga Prasad Oli | 6 |
| Richard Olicker | 3 |
| Dennis Oliech | 3 |
| Jason Olim | 11 |
| Bill Olin | 7 |
| Chris Olin | 5 |
| David Olin | 3 |
| Julia Olin | 9 |
| Ron Olin | 2 |
| Mark Oline | 18 |
| Dave Olinger | 3 |
| Dwayne Olinger | 2 |
| Jenn Olinger | 3 |
| John Olinger | 3 |
| Jon Olinger | 2 |
| Matt Olinger | 5 |
| Lane Olinghouse | 2 7 1 |
| Lane Olinhouse | 1 1 |
| Ivan Olinsky | 6 |
| George Oliphant | 3 |
| Kendall Oliphant | 3 |
| | Margaret Oliphant (1828-1897) | 1 11 |
| Molefi Oliphant | 1 |
| Patrick B. Oliphant | 1 |
| Richard Oliphant | 3 |
| Jose Oliva | 3 |
| Tony Oliva (1940-) | 21 |
| Olmo Olivares | 2 |
| Pablo Olivares | 3 |
| Eduardo Olivarez | 3 |
| Frank Olivas | 4 |
| Loui Olivas | 3 |
| Maria Olivas | 2 |
| David Olive | 3 |
| John Olive | 5 |
| Mark Olive | 3 |
| Ray Olive | 9 |
| Shane Olivea | 27 |
| | Gustaf Olivecrona (1924-) | 1 |
| Adalberto Oliveira | 3 |
| Alexandre Oliveira | 4 |
| James Oliveira | 4 |
| Marilyn Oliveira | 15 |
| Ricardo Oliveira | 4 |
| Abby Oliver | 2 |
| Adrian Oliver | 3 |
| Anton Oliver | 5 |
| Bill Oliver | 15 |
| Bob Oliver | 7 |
| Charles Oliver | 3 |
| Chris Oliver | 10 |
| Clay Oliver | 3 |
| Craig Oliver | 5 |
| Dan Oliver | 5 |
| Darren Oliver | 2 |
| David Oliver | 25 |
| Debbie Oliver | 5 |
| Donald Oliver | 6 |
| Doug Oliver | 9 |
| Dr. Wendy Oliver | 3 |
| Eric Oliver | 4 |
| | F. S. Oliver (1864-1934) | 1 |
| Frederick Scott Oliver | 6 |
| Gene Oliver (1935-) | 4 |
| Harry Oliver (1888-) | 1 13 |
| James Oliver | 6 |
| Jamie Oliver | 18 |
| Jappy Oliver | 4 |
| Jim Oliver | 13 |
| John Oliver | 10 |
| Jools Oliver | 5 |
| Joseph Oliver | 4 |
| Karla Oliver | 5 |
| Ken Oliver | 1 |
| Kendrick Oliver | 6 |
| Lawrence Oliver | 3 |
| Lin Oliver | 2 |
| Louis Oliver | 3 |
| Mark Oliver | 7 |
| Mary Oliver | 1 8 |
| Melvin Oliver | 4 |
| Michael Oliver | 3 |
| Mike Oliver | 15 |
| Peter Oliver | 5 |
| Richard Oliver | 15 |
| Rick Oliver | 4 |
| Rob Oliver | 2 |
| Ron Oliver | 6 |
| Rusty Oliver | 4 |
| Shane Oliver | 41 |
| Stephen Oliver | 6 |
| Susan Oliver | 2 |
| Tim Oliver | 10 |
| Tom Oliver | 6 |
| Trevor Oliver | 4 |
| Vince Oliver | 11 |
| Marvin Oliver's | 4 |
| Armando Olivera | 2 |
| Fernando Olivera | 2 |
| Jose Olivero | 2 |
| Jim Oliverson | 3 |
| Susan Oliveto | 3 |
| Kathy Olivier | 25 |
| | Laurence Olivier (1907-1989) | 12 5 |
| Laurenee Olivier | 1 |
| Lawrence Olivier | 3 3 |
| Marc Olivier | 3 |
| Michael Olivier | 9 |
| Philip Olivier | 1 |
| Robert Olivier | 3 |
| Robin Olivier | 1 |
| John Olivieri | 1 |
| Stefanie Olivieri | 3 |
| Miguel Olivo | 29 |
| Adam Olland | 3 |
| Steve Ollenburg | 1 |
| Doug Ollendike | 3 |
| Kevin Ollie | 6 |
| Jorma Ollila | 47 |
| Coleman Ollinger | 3 |
| Robin Ollis | 4 |
| Arthur Ollman | 2 |
| Mickey Ollson | 3 |
| Andres Olmedo | 3 |
| | José Joaquín Olmedo (1780-1847) | 4 |
| Ehud Olmert | 104 |
| Pat Olmi | 14 |
| Edward James Olmos (1947-) | 1 11 1 |
| Beth Olmstead | 3 |
| Dave Olmstead | 3 |
| Jon Olmstead | 2 |
| Kelly Olmstead | 3 |
| Frederick Law Olmsted | 4 |
| Greg Olmsted | 5 |
| Jim Olney | 1 |
| Kandace Olney | 5 |
| Chris Olofson | 5 |
| Maud Olofsson | 3 |
| Razvan Olosu | 5 |
| Michael Olowokandi (1975-) | 10 |
| Estella Olquin | 3 |
| Scott Olrich | 1 |
| | Sigrid Olrog | 1 |
| Jerry Olsavsky | 3 |
| Ashley Olsen (1986-) | 19 |
| Ben Olsen | 33 |
| Bill Olsen | 10 |
| Brian Olsen | 4 |
| Carl Olsen | 5 |
| Carol Olsen | 3 |
| Carrie Olsen | 2 |
| Chris Olsen | 12 |
| Christian Olsen | 4 |
| Chuck Olsen | 6 |
| Dan Olsen | 4 |
| Dave Olsen | 9 |
| David Olsen | 12 |
| Don Olsen | 13 |
| Egil Olsen (1942-) | 3 3 |
| Eric Olsen | 7 |
| Erik Olsen | 4 |
| Erling Olsen | 8 6 |
| Evan Olsen | 24 |
| Freilif Olsen | 3 3 |
| Frejlif Olsen | 23 3 |
| Gary Olsen | 2 |
| Greg Olsen | 25 |
| Gregg Olsen | 3 |
| Gregory Olsen | 25 |
| Hans Olsen | 43 |
| Jack Olsen | 6 |
| Janice Olsen | 3 |
| Jeff Olsen | 4 |
| Jim Olsen | 4 |
| John Olsen | 10 |
| Johnny Olsen | 5 |
| Karen Olsen | 3 |
| Keith Olsen | 2 |
| Ken Olsen (1926-) | 1 9 1 |
| Larry Olsen | 3 |
| Lee Olsen | 4 |
| Mark Olsen | 23 |
| Mary-Kate Olsen (1986-) | 10 |
| Merlin Olsen (1940-) | 6 |
| Michael Olsen | 3 |
| Morten Olsen | 3 25 1 |
| Norman Olsen | 2 |
| Olivia Olsen | 4 |
| Paul Olsen | 3 |
| Peter Olsen | 2 |
| Philip Olsen | 7 |
| Ron Olsen | 6 |
| Ross Olsen | 4 |
| Sara Olsen | 2 |
| Scott Olsen | 23 |
| Shawn Olsen | 4 |
| Sue Olsen | 1 |
| Susan Olsen | 5 |
| | Tillie Olsen (1912-) | 7 |
| Tom Olsen | 3 |
| Pam Olshanski | 4 |
| Tom Olshanski | 2 |
| Barbara Olshansky | 9 |
| Aaron Olson | 3 |
| Alex Olson | 3 |
| Alix Olson | 1 |
| Amy Olson | 7 |
| Andrew Olson | 6 |
| Anna Olson | 9 |
| Barbara Olson | 4 |
| Bart Olson | 3 |
| Benji Olson | 4 |
| Bill Olson | 5 |
| Blois Olson | 3 |
| Bob Olson | 6 |
| Brad Olson | 2 |
| Brian Olson | 3 |
| Bryan Olson | 3 |
| Candy Olson | 11 |
| Carl Olson | 18 |
| Carol Olson | 8 |
| Chad Olson | 17 |
| Charles Olson | 3 |
| Chris Olson | 3 |
| Chuck Olson | 14 |
| Craig Olson | 3 |
| Dan Olson | 11 |
| Darris Olson | 9 |
| David Olson | 26 |
| Diane Olson | 3 |
| Don Olson | 4 |
| Donna Olson | 3 |
| Doug Olson | 3 |
| Dr. Eric Olson | 4 |
| Drew Olson | 53 |
| Dustin Olson | 3 |
| Ed Olson | 3 |
| Eric Olson | 15 |
| Erik Olson | 13 |
| Erika Olson | 2 |
| Erin Olson | 5 |
| Gary Olson | 13 |
| Gerry Olson | 1 |
| Greg Olson | 8 |
| Heather Olson | 4 |
| Ingrid Olson | 9 |
| Jackie Olson | 3 |
| James Olson (1930-) | 17 |
| Jan Olson | 2 |
| Jason Olson | 5 |
| Jeff Olson | 16 |
| Jennifer Olson | 3 |
| Jeremy Olson | 5 |
| Jerry Olson | 5 |
| Jim Olson | 14 |
| Jodi Olson | 11 |
| John Olson | 24 |
| Jon Olson | 3 |
| Joy Olson | 3 |
| Judy Olson | 5 |
| Julie Olson | 2 |
| Karen Olson | 13 |
| Katie Olson | 2 |
| Keith Olson | 3 |
| | Ken Olson (1926-) | 2 8 |
| Kevin Olson | 3 |
| Kim Olson | 4 |
| Kyle Olson | 3 |
| Lance Olson | 6 |
| Larry Olson | 6 |
| Les Olson | 4 |
| Linda Olson | 3 |
| Link Olson | 2 |
| Lute Olson (1934-) | 383 |
| Lynn Olson | 11 |
| Mandie Olson | 5 |
| Mark Olson | 25 |
| Mayme Olson | 4 |
| Mike Olson | 10 |
| Nancy Olson | 1 |
| Nate Olson | 5 |
| Nelia Olson | 2 |
| Nina Olson | 6 |
| Patricia Olson | 8 |
| Paul Olson | 6 |
| Peter Olson | 12 |
| Phil Olson | 7 |
| Randy Olson | 7 |
| Rich Olson | 11 |
| Richard Olson | 7 |
| Rick Olson | 1 |
| Robert Olson | 6 |
| Rodney Olson | 2 |
| S. Olson | 2 |
| Samuel Olson | 4 |
| Sarah Olson | 6 |
| Scott Olson | 21 |
| Shanna Olson | 6 |
| Shannon Olson | 7 |
| Sharon Olson | 1 |
| Skip Olson | 3 |
| Stan Olson | 4 |
| Steve Olson | 17 |
| Steven Olson | 5 |
| Tammy Olson | 3 |
| Ted Olson | 9 |
| Terry Olson | 18 |
| Theodore Olson | 18 |
| Tim Olson | 7 |
| Tina Olson | 4 |
| Todd Olson | 19 |
| Tom Olson | 7 |
| Wayne Olson | 4 |
| Whitney Olson | 3 |
| Billy Olsson | 1 |
| Eva Olsson | 1 |
| | Jan Olof Olsson (1920-1974) | 1 |
| Mats Olsson (1929-) | 5 |
| Åsa Olsson | 1 |
| Robert Olstein | 8 |
| Brenda Olszewski | 3 |
| Janet Olszewski | 4 |
| Tim Olszewski | 4 |
| Tish Olszewski | 5 |
| Danyell Oltean | 3 |
| Rick Oltman | 6 |
| Scott Oltmann | 13 |
| Richard Olton | 1 |
| John Oltsik | 3 |
| Jon Oltsik | 15 |
| Bang Olufsen | 1 1 |
| Peter Olufsen | 1 |
| Darin Olver | 3 |
| John Olver | 8 |
| Andrew Olvera | 4 |
| Juan Olvera | 4 |
| Dave Olzendam | 2 |
| Herbert Kretzmer om Greta Garbo | 1 |
| Joan Rivers om Madonna | 1 |
| Groucho Marx om musikalen Hair | 1 |
| Charles Baudelaire om Richard Wagner | 1 |
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| David Oman | 10 |
| Mark Oman | 2 |
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| Jaspher Ombati | 19 |
| Nels Omdal | 2 |
| Esam Omeish | 4 |
| Gilbert Omenn | 2 |
| Dr Shigeru Omi | 12 |
| Dr. Shigeru Omi | 5 |
| Phil Omi | 2 |
| Shigeru Omi | 45 |
| Drew Omicioli | 3 |
| Karan Omidvari | 3 |
| Pierre Omidyar | 11 |
| Dan Omino | 8 |
| Steve Omischl | 4 |
| Gordon Ommen | 4 |
| Colby Omner | 3 |
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| Toloupe Omokaiye | 2 |
| Tolulope Omokaiye | 3 |
| Patrick Omondi | 2 |
| Philip Omondi | 6 |
| Greg Omoto | 8 |
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| Jeff Omspaugh | 3 |
| Hellen Omwando | 1 |
| Michael On | 6 |
| Marco Onado | 2 |
| Alexander Onassis | 1 |
 | Aristoteles Onassis (1906-1975) | 24 9 3 8 |
| Aristoteles Sokrates Onassis (1906-1975) | 2 2 |
| | Jacqueline Kennedy Onassis (1929-1994) | 1 34 1 |
| Joe Onderko | 3 |
| Patty Onderko | 4 |
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| Pally Ondrasik | 3 |
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| Derek Oney | 4 |
| Matt Oney | 3 |
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| John Ong | 2 |
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 | Yoko Ono (1933-) | 48 |
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| Patrick Onyango | 8 |
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| Tin Oo | 3 |
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| Sigurd Opdahl | 1 1 |
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| John Opie | 6 |
| Lembit Opik | 8 |
| Federico Opinion | 4 |
| Howard Opinsky | 8 |
| Ken Oplinger | 7 |
| Ron Oplinus | 3 |
| Ofwono Opondo | 9 |
| Peter Oppegard | 4 |
| Tony Oppegard | 32 |
| George Oppen | 2 |
| Hank Oppenborn | 2 |
| Daniel Oppenheim | 6 |
| James Oppenheim | 1 |
| Rob Oppenheim | 3 |
| Stephanie Oppenheim | 1 |
| Bruce Oppenheimer | 7 |
| Carol Oppenheimer | 3 |
| Harry Oppenheimer | 1 |
| Henry Oppenheimer | 2 |
| | J. Robert Oppenheimer (1904-1967) | 7 23 1 2 |
| Jonathan Oppenheimer | 5 |
| Michael Oppenheimer | 11 |
| Nicky Oppenheimer | 2 |
| Peter Oppenheimer | 29 |
| Yariv Oppenheimer | 2 |
| Richard Opper | 8 |
| Eugene Opperman | 8 |
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| Marius Oprea | 1 |
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| Kurt Opsahl | 34 |
| Ross M. Opsal | 5 |
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| Dave Opton | 4 |
| Ramon Opulencia | 1 |
| Jose Oquendo | 34 |
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| Clint Oram | 6 |
| Kent Oram | 3 |
| Baskin Oran | 1 |
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| Vilhelm av Oranien | 1 |
| Lawrence Orans | 6 |
| Bob Oravec | 3 |
| Jerry Orbach (1935-) | 7 |
| Raymond Orbach | 2 |
| Susie Orbach | 5 |
| Jens Orback | 4 |
| Barbara Langland Orban | 4 |
| Holly Orban | 2 |
| Viktor Orban | 6 |
| | Robert Orben (1927-) | 8 42 3 2 |
| | Roy Orbison (1936-1988) | 8 |
| William Orbit | 4 |
| Jerry Orchanian | 3 |
| Andy Orchard | 6 |
| David Orchard | 3 |
| Jake Orchard | 7 |
| Michael Orchin | 15 |
| Jim Orcutt | 3 |
| Baroness Orczy (1865-) | 6 |
| Hugh Orde | 9 |
| Sir Hugh Orde | 11 |
| Van Orden | 13 |
| Elizabeth Ordenstein | 3 |
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| | Fornsvenskt ordspråk | 1084 |
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| Svenskt ordspråk | 73 |
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| Ungerskt ordspråk | 2 |
| Västafrikanskt ordspråk | 9 |
| Österländskt ordspråk | 1 |
| Afghansk Ordtak | 1 1 |
| Afrikansk Ordtak | 7 7 |
| Albansk Ordtak | 2 2 |
| Algerie Ordtak | 1 1 |
| Amerikansk Ordtak | 6 6 |
| Arabisk Ordtak | 36 36 |
| Armensk Ordtak | 4 4 |
| Belgisk Ordtak | 4 4 |
| Brasiliansk Ordtak | 1 1 |
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| Burma Ordtak | 1 1 |
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| Dansk Ordtak | 288 291 |
| Elfenbenskysten Ordtak | 1 1 |
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| Finsk Ordtak | 85 86 |
| Fransk Ordtak | 20 20 |
| Færoysk Ordtak | 3 3 |
| Færøysk Ordtak | 2 3 |
| Gammelt Ordtak | 11 11 |
| Georgisk Ordtak | 1 1 |
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| Ghanisk Ordtak | 1 1 |
| Gresk Ordtak | 10 10 |
| Gronlandsk Ordtak | 1 1 |
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| Hawaiisk Ordtak | 1 1 |
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| Indisk Ordtak | 13 13 |
| Indonesisk Ordtak | 1 1 |
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| Irsk Ordtak | 3 3 |
| Islandsk Ordtak | 30 30 |
| Italiensk Ordtak | 26 26 |
| Japansk Ordtak | 9 9 |
| Jiddisch Ordtak | 4 4 |
| Jodisk Ordtak | 1 1 |
| Jugoslavia Ordtak | 3 3 |
| Jugoslavisk Ordtak | 2 2 |
| Jødisk Ordtak | 3 3 |
| Kamerun Ordtak | 2 3 |
| Kamerunsk Ordtak | 1 1 |
| Kashmirsk Ordtak | 4 4 |
| Keltisk Ordtak | 1 1 |
| Kenyansk Ordtak | 3 3 |
| Kinesisk Ordtak | 86 86 |
| Kiswahili Ordtak | 3 3 |
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| Mongolsk Ordtak | 3 3 |
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| Nederlandsk Ordtak | 4 4 |
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| Nordisk Ordtak | 144 148 |
| Nordiske ordtak | 1 1 |
| Norsk Ordtak | 306 309 |
| Orientalsk Ordtak | 2 2 |
| Pakistansk Ordtak | 1 1 |
| Persisk Ordtak | 3 3 |
| Peruansk Ordtak | 1 1 |
| Polsk Ordtak | 5 5 |
| Polynesisk Ordtak | 2 2 |
| Portugisisk Ordtak | 4 4 |
| Russisk Ordtak | 15 15 |
| Samisk Ordtak | 3 3 |
| Sechuana Ordtak | 3 3 |
| Skotsk Ordtak | 4 4 |
| Slovakisk Ordtak | 2 2 |
| Slovensk Ordtak | 2 2 |
| Somalisk Ordtak | 2 2 |
| Sovjetisk Ordtak | 1 1 |
| Spansk Ordtak | 14 14 |
| Svensk Ordtak | 177 178 |
| Swahilisk Ordtak | 2 2 |
| Tanzania Ordtak | 1 1 |
| Thai Ordtak | 3 3 |
| Tyrkisk Ordtak | 21 21 |
| Tysk Ordtak | 20 21 |
| Ukjente ordtak | 22 22 |
| Ukrainsk Ordtak | 5 5 |
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| Uzbekisk Ordtak | 1 1 |
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| Walisisk Ordtak | 3 3 |
| Zimbabwisk Ordtak | 1 1 |
| østerlandsk Ordtak | 1 1 |
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| Branden Ore | 5 |
| Norbert J. Ore | 17 |
| Abiodun Orebiyi | 4 |
| Callie Orebo | 4 |
| Tom Oreck | 3 |
| Natalia Oreiro (1977-) | 1 |
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| Craig Oren | 5 |
| Michael Oren | 9 |
| Donna Orender | 8 |
| Donald Orendorf | 2 |
| Joe Orenstein | 5 |
| Karen Orenstein | 2 |
| Rep. David Orentlicher | 5 |
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| Naomi Oreskes | 3 |
| Harry Orf | 10 |
| Carl Orff (1895-) | 2 |
| Craig Orfield | 5 |
| Gary Orfield | 14 |
| Myron Orfield | 2 |
| Sean Organ | 15 |
| Steve Organ | 3 |
| Superintendent Richard Organisciak | 2 |
| Ed Orgeron | 123 |
| Debbie Orgill | 2 |
| Diane Orgill | 3 |
| John Orgren | 6 |
| Keith Ori | 1 |
| Ricky Ori | 3 |
| Mordechai Orian | 3 |
| Jane Orient | 3 |
| Lisa Origlasso | 3 |
| Lisa Origliasso | 8 |
| Judy Orihuela | 11 |
| Seiki Orimi | 2 |
| Phil Orlandella | 7 |
| Dael Orlandersmith | 1 |
| Dave Orlandini | 10 |
| Debbie Orlandini | 3 |
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| Amy Orlando | 2 |
| Charles Orlando | 1 |
| Frank Orlando | 2 |
| Jennifer Orlando | 3 |
| Joe Orlando | 14 |
| John Orlando | 1 |
| Joseph Orlando | 5 |
| Phil Orlando | 9 |
| Philip Orlando | 5 |
| Simone Orlando | 3 |
| Steve Orlando | 16 |
| Tony Orlando (1944-) | 5 |
| Vittorio Emanuele Orlando | 1 |
| Tom Orlich | 4 |
| David Orloff | 1 |
| Judith Orloff | 10 |
| Ron Orlosky | 6 |
| Andrei Orlov | 3 |
| Oleg Orlov | 4 |
| Sergei Orlov | 2 |
| Natalya Orlova | 3 |
| Sergei Orlovskiy | 3 |
| Dan Orlovsky | 10 |
| Julie Orlowski | 8 |
| Larry Orluskie | 5 |
| John Orman | 3 |
| Suze Orman | 14 |
| Rich Ormand | 4 |
| Eugene Ormandy (1899-) | 81 |
| Tavis Ormandy | 2 |
| Barbara Ormerod | 3 |
| Carly Ormerod | 8 |
| Jerry Ormes | 4 |
| Joanna Ormesher | 3 |
| Javelin Ormond | 6 |
| Neal Ormond | 4 |
| Rep. Timm Ormsby | 3 |
| David Ormsby-Gore | 1 |
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| Scott Orness | 2 |
| Dean Ornish | 9 |
| Jonathan Ornstein | 19 |
| Mike Ornstein | 5 |
| Norm Ornstein | 31 |
| Norman Ornstein | 48 |
| Nick Ornstien | 1 |
| Brian Orol | 6 |
| Henry Luke Orombi | 2 |
| Coach Paul Orong | 2 |
| Maria Oropeza | 7 |
| Jesse Orosco | 2 |
| Joseph Orosz | 2 |
| Carlos Oroteza | 3 |
| Rhys Orpe | 3 |
| Nick Orphanos | 3 |
| Brooks Orpik | 12 |
| Eduardo Orpis | 4 |
| Aniela Orr | 8 |
| Bob Orr | 11 |
| Bobby Orr (1948-) | 13 |
| Brad Orr | 3 |
| Brandon Orr | 4 |
| Brian Orr | 4 |
| Carolyn Orr | 3 |
| Carrie Orr | 2 |
| Charlene Orr | 3 |
| Cheryl Orr | 3 |
| Chris Orr | 2 |
| Christelle Orr | 1 |
| Colton Orr | 4 |
| Dale Orr | 7 |
| David Orr (1922-) | 66 |
| Dominic Orr | 1 |
| Dr. Louis Orr | 2 |
| Hugh Robert Orr | 1 |
| Jack Orr | 9 |
| James Orr | 9 |
| Jeff Orr | 7 |
| Jerry Orr | 1 |
| Jim Orr | 1 |
| Joanne Orr | 3 |
| John Boyd Orr | 1 |
| John Orr | 6 |
| Jonathan Orr | 7 |
| Justin Orr | 3 |
| Karen Orr | 3 |
| Katherine Orr | 3 |
| Kim Orr | 8 |
| Leonard Orr | 21 |
| Louis Orr | 97 |
| Marion Orr | 5 |
| Mark Orr | 2 |
| Mike Orr | 4 |
| Pete Orr | 7 |
| Rich Orr | 4 |
| Richard Orr | 4 |
| Robert Orr | 25 |
| Sean Orr | 6 |
| Skip Orr | 3 |
| Tae Orr | 3 |
| Elaine Orrbine | 3 |
| John Orrico | 11 |
| Jerry Orris | 3 |
| Keith Orris | 3 |
| John Orrock | 1 |
| Naas Orrser | 2 |
| Brian Orser (1961-) | 10 |
| Mike Orser | 3 |
| Pryor Orser | 5 |
| Danielle Orsillo | 3 |
| Michael Orsini | 4 |
| Steve Orsini | 4 |
| Clark Orsky | 3 |
| Lee Orsky | 2 |
| Alberto Orso | 2 |
| Peter Orszag | 7 |
| Steven Orszag | 3 |
| Vladimir Orszagh | 5 |
| Harry Ort | 3 |
| Randy Ort | 10 |
| Greg Ortale | 2 |
| Adrian Ortega | 2 |
| Albino Ortega | 3 |
| Clara Ortega | 2 |
| Daniel Ortega | 20 |
| Edward Ortega | 3 |
| Jaime Ortega | 4 |
| Jennifer Ortega | 3 |
| Jillian Ortega | 5 |
| Joe Ortega | 3 |
| Jope Ortega | 2 |
| Katherine D. Ortega | 1 |
| Rep. Presi Ortega | 4 |
| Sheen Ortega | 1 |
| Ed Ortego | 7 |
| Jolene Ortego | 5 |
| Tim Ortelli | 9 |
| Arthur Ortenberg | 1 |
| Tom Ortenberg (1960-) | 17 |
| Bryan Ortenzio | 2 |
| Sally Ortgies | 3 |
| Ben Orth | 6 |
| David Orth | 3 |
| Maureen Orth | 5 |
| Jill Orthel | 2 |
| Dennis Orthner | 3 |
| Norberto Ortigoza | 2 |
| Svetlana Ortiqova | 1 |
| Amanda Ortiz | 2 |
| Anna Ortiz | 3 |
| Bertha Ortiz | 6 |
| Carlos Ortiz | 5 |
| David Ortiz | 221 |
| Derek Ortiz | 2 |
| Edwin Ortiz | 7 |
| Frank Ortiz | 4 |
| Gabriel Ortiz | 4 |
| Guillermo Ortiz | 10 |
| Ivan Ortiz | 2 |
| Joe Ortiz | 3 |
| Jorge Ortiz | 4 |
| Jose Ortiz | 9 |
| Kevin Ortiz | 3 |
| Leroy Ortiz | 4 |
| Melissa Ortiz | 2 |
| Mike Ortiz | 11 |
| Millie Ortiz | 5 |
| Nelson Ortiz | 3 |
| Oscar Ortiz | 6 |
| Paul Ortiz | 3 |
| Ramon Ortiz | 24 |
| Rene Ortiz | 3 |
| Rick Ortiz | 4 |
| Robert Ortiz | 4 |
| Roman Ortiz | 1 |
| Russ Ortiz | 31 |
| Solomon Ortiz | 5 |
| Stephanie Ortiz | 4 |
| Thom Ortiz | 4 |
| Vic Ortiz | 13 |
| Wilfredo Ortiz | 3 |
| Dan Ortmeier | 3 |
| Roger Ortmeier | 5 |
| Jed Ortmeyer | 3 |
| Mike Ortner | 12 |
| Sarah Ortner | 4 |
| Barry Orton | 8 |
| Dave Orton | 3 |
| David Orton | 6 |
| | Joe Orton (1933-1967) | 2 7 1 |
| John Orton | 11 |
| Kyle Orton | 114 |
| Larry Orton | 3 |
| Dan Ortwerth | 2 |
| Wilson Oruma | 4 |
| Chad Orvella | 3 |
| | George Orwell (1903-1950) | 34 151 4 21 |
| Cheryl Ory | 3 |
| Gene Orza | 46 |
| Ken Orze | 2 |
| Dave Orzel | 5 |
| Stan Orzel | 6 |
| Wayne Orzel | 6 |
| Richard Orzy | 3 |
| Atsushi Osa | 14 |
| Phil Osaer | 13 |
| Ghassan Osailan | 1 |
| Paul Osaki | 2 |
| Mary Osako | 33 |
| Fumio Osanai | 4 |
| Evans Osano | 2 |
| Mitsuhiro Osawa | 8 |
| Molly Osberg | 2 |
| Randi Osberg | 11 |
| Ken Osbon | 4 |
| Andy Osborn | 3 |
| Bonnie Osborn | 4 |
| Casey Osborn | 3 |
| Dave Osborn | 8 |
| Ed Osborn | 3 |
| Jim Osborn | 4 |
| John Osborn | 6 |
| Kevin Osborn | 5 |
| Kirk Osborn | 7 |
| Liz Osborn | 3 |
| Matthew Osborn | 3 |
| Mitch Osborn | 9 |
| Rex Osborn | 16 |
| Robin Osborn | 2 |
| Royce Osborn | 9 |
| Shane Osborn | 14 |
| Sim Osborn | 5 |
| Tim Osborn | 3 |
| Valerie Osborn | 7 |
| | Adam Osborne (1939-2003) | 16 |
| Alick Osborne | 1 |
| Andy Osborne | 3 |
| Bill Osborne | 2 |
| Billy Osborne | 1 |
| Bob Osborne | 3 |
| Chris Osborne | 3 |
| Christina Osborne | 3 |
| David Osborne | 6 |
| Ed Osborne | 2 |
| Eric Osborne | 2 |
| Everett Osborne | 2 |
| George Osborne | 12 |
| Hamilton Osborne | 4 |
| Happy Osborne | 1 |
| James Osborne | 4 |
| Jay Osborne | 6 |
| Jeff Osborne | 3 |
| Jeremy Osborne | 5 |
| Joan Osborne (1962-) | 9 |
| | John Osborne (1929-1994) | 21 23 3 7 |
| Karen Osborne | 6 |
| Kathy Osborne | 5 |
| Kenneth Osborne | 4 |
| Matt Osborne | 27 |
| Melanie Osborne | 2 |
| Mike Osborne | 5 |
| Paul Osborne | 3 |
| Peter Osborne | 5 |
| Robert Osborne | 4 |
| Ron Osborne | 4 |
| Shaun Osborne | 14 |
| Tom Osborne | 39 |
| Dale Osbourne | 5 |
| Happy Osbourne | 2 |
| Jack Osbourne | 26 |
| John Osbourne | 5 |
| | Kelly Osbourne (1984-) | 14 |
| Nathaniel Osbourne | 3 |
| | Ozzy Osbourne (1948-) | 2 26 |
| Sharon Osbourne (1952-) | 18 |
| Tom Osbourne | 3 |
| Cindy Osbrink | 4 |
| Bennie Osburn | 4 |
| C. Dixon Osburn | 14 |
| Chris Osburn | 1 |
| David Osburn | 3 |
| Heath Osburn | 2 |
| Steve Osburn | 5 |
| Max Osceola | 1 |
| Stefan Osche | 2 |
| Jeff Oscodar | 4 |
| Moses Osemwegie | 5 |
| Gary Osen | 3 |
| Jeff Oseroff | 4 |
| Charles Osgood (1933-) | 7 |
| Chris Osgood | 57 |
| David Osgood | 11 |
| Kassim Osgood | 4 |
| Samuel Osgood | 1 |
| Joe Osha | 48 |
| Joseph Osha | 12 |
| Abel Oshavire | 4 |
| Annette Osher | 3 |
| Abel Oshevire | 10 |
| Hiroshi Oshima | 8 |
| Keiji Oshima | 3 |
| Kenzo Oshima | 7 |
| Masami Oshima | 1 |
| Tatsuo Oshima | 3 |
| Yumi Oshima | 5 |
| Michael Oshinaya | 2 |
| Adams Oshiomhole | 4 |
| Hitoshi Oshitani | 4 |
| Bo Oshoniyi | 6 |
| Cassie Osiecki | 3 |
| Dave Osiecki | 3 |
| Mark Osiecki | 11 |
| Ivica Osim | 1 |
| Gordon Osinski | 1 |
| Dan Osipow | 5 |
| Vartan Oskanian | 4 |
| Matt Osland | 3 |
| David Osler | 4 |
 | William Osler (1849-1919) | 11 83 1 |
| Aftenposten, Oslo | 1 |
| Gordy Oslund | 2 |
| Bill Osmak | 1 |
| Betty Osman | 3 |
| Katherine Osman | 2 |
| Muna Osman | 4 |
| Nevine Osman | 1 |
| Semir Osmanagic | 6 |
| Azizullah Osmani | 1 |
| John Osmanski | 3 |
| Tim Osmar | 2 |
| | Haley Joel Osment (1988-) | 10 |
| Dennis Osmer | 3 |
| Eric Osmer | 10 |
| Justin Osmer | 15 |
| Megan Osmer | 3 |
| Dale Osmond | 3 |
| | Donny Osmond (1957-) | 19 |
| JoAnn Osmond | 2 |
| | Marie Osmond (1959-) | 2 7 |
| Merrill Osmond (1953-) | 2 |
| John Osmulski | 3 |
| Eric Osmundson | 9 |
| Kevin Osnes | 22 |
| Randy Osnes | 38 |
| Peter Osnos | 4 |
| Howard Osofsky | 4 |
| Maureen Osolnik | 5 |
| Daniel Osorio | 3 |
| Edward Osorio | 2 |
| Babatunde Osotimehin | 4 |
| Diana Ossana | 10 |
| Todd Ossian | 3 |
| Carl Von Ossietzky | 1 |
| Justin Ossola | 6 |
| Albert Osswald | 1 |
| Eric Ost | 3 |
| Frank Ostanik | 6 |
| Dr. Truls Ostbye | 3 |
| Leo Ostebo | 3 |
| Joel Osteen | 11 |
| Can Osten | 1 |
| Leticia Van Osten | 3 |
| Linda Osten | 3 |
| Alan Oster | 26 |
| Jason Oster | 3 |
| Merrill Oster | 6 |
| Michael Oster | 4 |
| Richard Oster | 5 |
| Bev Osterberg | 3 |
| Don Osterberg | 4 |
| Gayle Osterberg | 7 |
| Jon Osterberg | 4 |
| Deborah Osterfeld | 3 |
| Naomi Ostergar | 2 |
| Judy Osterhage | 3 |
| Albert Osterhaus | 12 |
| Michael Osterholm | 57 |
| Mike Osterholm | 6 |
| John Osterhoudt | 3 |
| Randall Osterhuber | 4 |
| James Osterkamp | 3 |
| Bernd Osterloh | 4 |
| Rick Osterloh | 1 |
| Cat Osterman | 15 |
| Kevin Osterman | 3 |
| Michael Osterman | 9 |
| Daniel Ostermann | 3 |
| Peter Ostermiller | 2 |
| Greg Ostertag (1973-) | 15 |
| Quetel Osterval | 6 |
| Jenifer Osterwalder | 1 |
| Jennifer Osterweil | 2 |
| Anja Osthoff | 4 |
| Susanne Osthoff | 2 |
| Frank Ostini | 4 |
| Scott Ostler | 10 |
| Richard N. Ostling | 1 |
| Bryan Ostlund | 3 |
| Deirdre Ostlund | 2 |
| Michael Ostlund | 4 |
| Oscar Ostlund | 3 |
| Corey Ostman | 76 |
| Cory Ostman | 1 |
| Jelena Ostojic | 1 |
| Bill Ostrander | 3 |
| Elaine Ostrander | 3 |
| Gary Ostrander | 3 |
| Kent Ostrander | 3 |
| Mark Ostrander | 4 |
| Melissa Ostrander | 4 |
| Rob Ostrander | 1 |
| Superintendent Sherman Ostrander | 3 |
| Deborah Ostreicher | 3 |
| John Ostrem | 4 |
| Wit Ostrenko | 7 |
| Dawn Ostroff | 23 |
| Aaron Ostrom | 3 |
| Joan Ostrom | 3 |
| Peggy Ostrom | 5 |
| Beth Ostrosky | 3 |
| Karen Ostrov | 4 |
| Alexander Ostrovski | 1 |
| Michael Ostrovsky | 7 |
| Daniel Ostrow | 3 |
| Diane Ostrowski | 4 |
| James Ostrowski | 3 |
| Jennifer Ostrowski | 3 |
| Justin Ostrowski | 2 |
| Steven Ostrowski | 4 |
| Don Ostrowsky | 5 |
| Marc Ostwald | 8 |
| Masanori Osuga | 2 |
| Michael OSullivan | 3 |
| Tabu Osusa | 1 |
| Andrew Oswald | 5 |
| Denis Oswald | 14 |
| Dick Oswald | 2 |
| Lee Harvey Oswald (1939-) | 10 |
| Marguerite Oswald (1907-) | 5 |
| Marina Oswald (1941-) | 2 |
| Tom Oswald | 11 |
| Roy Oswalt | 128 |
| Tom Oswalt | 3 |
| Tanner Osweiler | 3 |
| Mark Oswell | 3 |
| Arnaldo Otegi | 5 |
| Paul Otellini | 51 |
| Bruno Otero | 8 |
| Charlie Otero | 6 |
| Jessica Otero | 4 |
| Jos Otero | 1 |
| José Otero | 2 |
| Maria Otero | 1 |
| The Others | 9 |
| Mahmoud Othman | 81 |
| Mahmud Othman | 23 |
| Narmine Othman | 1 |
| Nermine Othman | 4 |
| Clarence Otis | 4 |
| George Otis | 1 |
| James Otis | 3 |
| Larry Otis | 2 |
| Mark Otis | 4 |
| Molly Otis | 3 |
| Toyoo Otsubo | 2 |
| Akinori Otsuka | 19 |
| Mutsutake Otsuka | 1 |
| Ryuta Otsuka | 12 |
| Satoru Otsuka | 1 |
| Toru Otsuka | 6 |
| Bob Ott | 6 |
| Chris Ott | 3 |
| Curt Ott | 3 |
| Don Ott | 1 |
| Harry Ott | 1 |
| Jim Ott | 5 |
| Jimmy Ott | 1 |
| Mark Ott | 3 |
| Mirjam Ott | 3 |
| Rick Ott | 5 |
| Shely Ott | 4 |
| Steve Ott | 3 |
| Wendell Ott | 3 |
| Gerald Ottavino | 3 |
| Eric Ottaway | 3 |
| Marina Ottaway | 8 |
| Bill Otte | 10 |
| Marc Otte | 9 |
| Abby Ottenhoff | 28 |
| Lawrence M. Otter | 5 |
| Tommy Otterbine | 5 |
| Larry Otterblad | 2 |
| Mike Otterson | 2 |
| David Otterstein | 2 |
| Gray Ottley | 3 |
| Tim Ottmann | 2 |
| Barry Otto | 7 |
| Courtney Otto | 5 |
| Dave Otto | 9 |
| David Otto | 7 |
| Don Otto | 4 |
| Hennie Otto | 5 |
| | Herbert A. Otto | 4 |
| Jim Otto | 7 |
| Katrina Otto | 5 |
| Miranda Otto (1967-) | 5 |
| Paula Otto | 6 |
| Richard Otto | 4 |
| Ron Otto | 10 |
| Scott Otto | 3 |
| Skip Otto | 3 |
| Sylke Otto | 8 |
| Bob Ottolini | 1 |
| Brad Otton | 1 |
| Sid Otton | 7 |
| Steve Ottoson | 4 |
| Evelyn Otula | 2 |
| Bernhard Otupal | 5 |
| Howard Otway | 2 |
| Nick Otway | 2 |
| | Thomas Otway (1652-1685) | 1 11 |
| Shawn Oubre | 4 |
| Kugao Ouchi | 1 |
| Betty Ouderkirk | 3 |
| Scott Oudsema | 3 |
| Eric Ouellet | 2 |
| Maxime Ouellet | 10 |
| Michel Ouellet | 7 |
| Chris Ouellette | 2 |
| Denis Ouellette | 1 |
| Gary Ouellette | 3 |
| Guy Ouellette | 3 |
| Libby Ouellette | 10 |
| Nicholas Ouellette | 2 |
| Roger Ouellette | 6 |
| Talal Oukal | 3 |
| Roger Oukrop | 3 |
| Richard Oulahan | 1 |
| Jordan Oulman | 3 |
| Marilyn Ounjian | 2 |
| Maxime Ourly | 2 |
| Fulton Oursler (1893-) | 3 |
| Dennis Oury | 3 |
| Edie Ousley | 7 |
| Melissa Ousley | 2 |
| P. D. Ouspensky | 2 |
| John Ousterhout | 1 |
| | Denise Van Outen (1973-) | 4 |
| Ross Outerbridge | 5 |
| Drew Outhouse | 3 |
| Steve Outing | 7 |
| Deb Outlaw | 2 |
| Frank Outlaw | 10 |
| Judy Outlaw | 4 |
| Elizabeth Outz | 3 |
| Børge Outze | 8 2 |
| Børge Outze | 2 |
| Michael Ouweleen | 3 |
| Boris Ovchinnikov | 2 |
| Alex Ovechkin | 19 |
| Alexander Ovechkin | 57 |
| Karen Overacker | 3 |
| Lyle Overbay | 33 |
| Judi Overbey | 4 |
| | Sir Thomas Overbury (1581-1613) | 1 |
| Christine Overby | 3 |
| Mark Overby | 1 |
| Tami Overby | 4 |
| Tammy Overcash | 1 |
| Mike Overcast | 1 |
| Michael Overfield | 2 |
| Chad Overholser | 1 |
| Keith Overholt | 4 |
| Arnulf Overland | 24 23 1 |
| Christian W. Overland | 7 |
| James Overland | 3 |
| Janneken Overland (1946-) | 1 1 |
| Simon Overland | 4 |
| Marshall Overley | 6 |
| Michael Overly | 7 |
| Tangee Overly | 5 |
| Gregg Overman | 7 |
| Jeff Overmyer | 6 |
| Michael Overmyer | 3 |
| Jonathan Overpeck | 16 |
| Paul Oversier | 4 |
| Cornele Overstreet | 3 |
| David Overstreet | 8 |
| Greg Overstreet | 4 |
| Bo Overton | 2 |
| Chris Overton | 2 |
| Eric Overton | 5 |
| Gary Overton | 4 |
| Jay Overton | 8 |
| Jeff Overton | 13 |
| Patrick Overton | 3 |
| Spencer Overton | 6 |
| Tommy Overton | 4 |
| Venoy Overton | 6 |
| Wes Overton | 13 |
| Robert Overtoom | 2 |
| Greg Oveson | 4 |
| Jumadurdy Ovezov | 2 |
| John Ovink | 4 |
| Michael Ovitz | 6 |
| Chris Ovrebo | 4 |
| Alaa Owaineh | 4 |
| Daniel Owczarski | 2 |
| Ray Owczarzak | 3 |
| Ann Owen | 8 |
| Arnie Owen | 7 |
| Betsy Owen | 3 |
| Bill Owen | 14 |
| Bob Owen | 6 |
| Bobbie Owen | 1 |
| Cherie Owen | 6 |
| Chuck Owen | 3 |
| Cindy Owen | 2 |
| Clay Owen | 4 |
| Clive Owen (1964-) | 28 |
| Daryll Owen | 3 |
| Dave Owen | 3 |
| David Owen | 16 |
| Donald Owen | 3 |
| Fred Owen | 2 |
| Gareth Owen | 3 |
| Gary Owen | 11 |
| Grainne Owen | 4 |
| Greg Owen | 45 |
| Jeff Owen | 2 |
| Jennifer Owen | 6 |
| Jenny Owen | 3 |
| Jim Owen | 22 |
| Joe Owen | 2 |
| Jof Owen | 1 |
| John Jason Owen | 1 |
| John Owen | 1 26 |
| Jonathan Owen | 1 |
| Karen Owen | 5 |
| Ken Owen | 7 |
| Laura Owen | 1 |
| Les Owen | 8 |
| Lloyd Owen (1966-) | 3 |
| Mark Owen | 7 |
| Mary Owen | 2 |
| Matthew Owen | 3 |
| Michael Owen | 143 |
| Mike Owen | 4 |
| Nancy Owen | 2 |
| Nicholas Owen | 1 |
| Nick Owen (1947-) | 3 |
| Olly Owen | 3 |
| Randy Owen | 5 |
| | Richard Owen (1804-1892) | 12 |
| | Robert Owen (1771-1858) | 1 11 |
| Roger Owen | 5 |
| Stephen Owen | 3 |
| Steve Owen | 14 |
| Steven Owen | 4 |
| Ted Owen | 5 |
| Tom Owen | 15 |
| Wendy Owen | 2 |
| | Wilfred Owen (1893-1918) | 14 |
| Aaron Owens | 5 |
| Andre Owens | 6 |
| Andy Owens | 3 |
| Anthony Owens | 2 |
| Bill Owens | 109 |
| Billy Owens | 4 |
| Brian Owens | 7 |
| Buck Owens | 23 |
| Burke Owens | 3 |
| Carol Owens | 21 |
| Chad Owens | 8 |
| Charles Owens | 10 |
| Chief Dave Owens | 3 |
| Chris Owens | 6 |
| D.J. Owens | 5 |
| Dan Owens | 9 |
| Darrel Owens | 14 |
| | David Owens | 10 |
| Dean Owens | 4 |
| Debbie Owens | 3 |
| Don Owens | 3 |
| Dr. O'dell Owens | 6 |
| Gary Owens | 6 |
| Greg Owens | 4 |
| James Owens | 3 |
| Jayanti Owens | 5 |
| Jeff Owens | 2 |
| Jennifer Owens | 3 |
| Jerry Owens | 8 |
| | Jesse Owens (1913-1980) | 1 26 |
| Jill Owens | 2 |
| Jim Owens | 28 |
| Joe Owens | 6 |
| John Owens | 19 |
| Judith Owens | 9 |
| Karen Owens | 4 |
| Karla Owens | 4 |
| Katie Owens | 3 |
| Lamar Owens | 7 |
| Marcus Owens | 4 |
| Mark Owens | 5 |
| Matt Owens | 3 |
| Megan Owens | 3 |
| Michael Owens | 1 |
| Mike Owens | 26 |
| Pete Owens | 7 |
| Ray Owens | 3 |
| Richard Owens | 2 |
| Rick Owens | 5 |
| Rissie Owens | 2 |
| Robbie Owens | 4 |
| Robert Owens | 6 |
| Sam Owens | 2 |
| Sarah Owens | 5 |
| Scott Owens | 23 |
| Sharon Owens | 3 |
| Sherie Owens | 4 |
| Sherry Owens | 3 |
| Steve Owens | 17 |
| Ted Owens | 2 |
| Teresa Owens | 4 |
| | Terrell Owens (1973-) | 176 |
| Tim Owens | 2 |
| Tom Owens | 8 |
| Jennifer Owensby | 3 |
| Anne Owers | 4 |
| Jacob Owiti | 4 |
| Adam Owlett | 4 |
| Joe Owmby | 6 |
| Melody Owsley | 14 |
| Suzie Owsley | 2 |
| Rich Owusu | 3 |
| Graeme Oxby | 2 |
| Jim Oxendine | 3 |
| John Oxendine | 8 |
| John Oxenham | 2 |
| | Count Oxenstierna (1583-1654) | 1 |
| | Johan T. Oxenstierna (1666-1733) | 6 2 |
| John Oxford | 7 |
| Vayl Oxford | 3 |
| Jay Oxley | 5 |
| John Oxley | 4 |
| Michael Oxley | 20 |
| Will Oxley | 2 |
| Brian Oxman | 11 |
| Michael Oxman | 5 |
| Dewey Oxner | 3 |
| Seth Oxner | 1 |
| Takashi Oya | 7 |
| Akihiro Oyama | 2 |
| Shiho Oyama | 2 |
| Harvey Oyer | 3 |
| Rodney Oyler | 3 |
| Chris Oynes | 5 |
| Oluremi Oyo | 1 |
| Remi Oyo | 10 |
| Jim Oyster | 10 |
| Sanjaasuren Oyun | 4 |
| Amos Oz (1939-) | 1 8 1 |
| | Frank Oz (1944-) | 28 |
| Ran Oz | 1 |
| Helio Ozaki | 16 |
| Kiyoshi Ozaki | 2 |
| Mark Ozaki | 2 |
| Avni Ozan | 3 |
| Antonie Ozanam | 1 1 |
| Ichiro Ozawa | 16 |
| Seiji Ozawa (1935-) | 4 |
| Rifat Ozbek | 3 |
| Ozzy Ozbourne | 2 |
| Levent Ozcolak | 1 |
| Katie Ozdemir | 3 |
| Bahadir Ozdener | 4 |
| Tami Ozegovich | 3 |
| Amilcar Ozegueda | 1 |
| Oleg Ozerov | 2 |
| Ebru Ozgen | 3 |
| David Ozgo | 4 |
| Cynthia Ozick (1928-) | 19 |
| Jim Ozier | 7 |
| Dan Oziminski | 5 |
| Dale Ozment | 2 |
| Rep. Dennis Ozment | 6 |
| Ron Ozment | 3 |
| Sandis Ozolinsh | 14 |
| Lona Ozrek | 3 |
| Mustafa Ozsoy | 1 |
| Melissa Ozuna | 2 |
| Gary Ozzello | 5 |
| Ray Ozzie | 28 |
