| Surname | Individuals |
|---|---|
|
O'Bannon
|
1 |
|
O'Dell
|
1 |
|
O'Neal
|
1 |
|
Oakley
|
2 |
|
Ob
|
1 |
|
Ockerman
|
1 |
|
Odle
|
2 |
|
Odom
|
2 |
|
of Hector MacLean
|
1 |
|
of Lord Carrick (Bruce)
|
1 |
|
Offutt
|
2 |
|
Ogilvie
|
2 |
|
Ojeda
|
1 |
|
Old
|
8 |
|
Olinger
|
1 |
|
Oliver
|
3 |
|
Olivia
|
1 |
|
Orr
|
3 |
|
Ortega
|
1 |
|
Orth
|
1 |
|
Osborn
|
2 |
|
Osborne
|
15 |
|
Osgood
|
1 |
|
Oslin
|
1 |
|
Otey
|
1 |
|
Otto
|
1 |
|
Overleese
|
1 |
|
Overstreet
|
2 |
|
Owen
|
6 |
|
Owens
|
12 |
