| Surname | Individuals |
|---|---|
|
O'Barr
|
2 |
|
O'Briski
|
8 |
|
O'Bryant
|
9 |
|
O'Conner
|
1 |
|
O'Dell
|
1 |
|
O'Guinn
|
1 |
|
O'Leary
|
1 |
|
O'Neal
|
9 |
|
O'Neill
|
1 |
|
O'Shaughnessy
|
3 |
|
Ochoa
|
1 |
|
Oden
|
1 |
|
Odle
|
4 |
|
Odom
|
4 |
|
Odrezin
|
2 |
|
Odum
|
5 |
|
Ogle
|
7 |
|
Oguinn
|
2 |
|
Olaker
|
1 |
|
Oldham
|
6 |
|
Olive
|
5 |
|
Oliver
|
11 |
|
Olivia
|
1 |
|
Olmos
|
1 |
|
Olvey
|
2 |
|
Openshaw
|
1 |
|
Oprean
|
2 |
|
Orange
|
2 |
|
Ore
|
1 |
|
Oren
|
1 |
|
Orr
|
20 |
|
Osborn
|
1 |
|
Osborne
|
6 |
|
Oswalt
|
1 |
|
Ouzts
|
1 |
|
Overall
|
4 |
|
Overby
|
1 |
|
Overfield
|
1 |
|
Overman
|
3 |
|
Owen
|
2 |
|
Owenby
|
2 |
|
Owens
|
19 |
|
Ownby
|
1 |
|
Owsley
|
1 |
|
Oxford
|
7 |
|
Ozley
|
116 |