| Surname | Individuals |
|---|---|
|
O Brien
|
1 |
|
O Neill
|
1 |
|
O'Brien
|
4 |
|
O'Carroll
|
1 |
|
O'Connor
|
2 |
|
O'Daniel
|
1 |
|
O'Dyer
|
2 |
|
O'Hara
|
2 |
|
O'Kelly
|
1 |
|
O'Konec
|
3 |
|
O'Neal
|
3 |
|
O'Sullivan
|
1 |
|
Oade
|
1 |
|
Oates
|
1 |
|
Obercrome
|
1 |
|
Obrien
|
4 |
|
Odell
|
2 |
|
Odem
|
1 |
|
Oden
|
1 |
|
Odier
|
1 |
|
Odle
|
3 |
|
Odom
|
28 |
|
Odum
|
2 |
|
Ogburn
|
2 |
|
Ogle
|
2 |
|
Oglesby
|
1 |
|
Oglethorpe
|
4 |
|
Oldham
|
2 |
|
Olive
|
1 |
|
Oliver
|
9 |
|
Olson
|
1 |
|
Orr
|
2 |
|
Ortiz
|
2 |
|
Osborn
|
1 |
|
Osborne
|
5 |
|
Osbourn
|
2 |
|
Osmundson
|
1 |
|
Osteen
|
1 |
|
Oswald
|
1 |
|
Ott
|
1 |
|
Outland
|
47 |
|
Outlaw
|
175 |
|
Ovak
|
1 |
|
Overman
|
4 |
|
Overstreet
|
1 |
|
Overton
|
54 |
|
Owen
|
2 |
|
Owenby
|
2 |
|
Owens
|
20 |
|
Owl
|
4 |
|
Oxberry
|
1 |
|
Oxford
|
17 |
|
Oxley
|
33 |
|
Ozbun
|
1 |