| Surname | Individuals |
|---|---|
|
Odden
|
6 |
|
of Carrick
|
1 |
|
of England
|
1 |
|
Oldcastle
|
1 |
|
Oliver
|
7 |
|
Olson
|
1 |
|
Orozco
|
1 |
|
Otterback
|
1 |