| Surname | Individuals |
|---|---|
|
O'Brien
|
1 |
|
O'Dea
|
1 |
|
O'Dell
|
1 |
|
O'Gorman
|
48 |
|
OWAIN
|
1 |
|
Obotrites
|
1 |
|
Ogden
|
79 |
|
Ogen
|
1 |
|
Ogilvie
|
1 |
|
Ogle
|
1 |
|
Ogston
|
1 |
|
Ohnsorg
|
2 |
|
Olander
|
9 |
|
Olesdatter
|
2 |
|
Olliver
|
2 |
|
Olsen
|
18 |
|
Oridson
|
1 |
|
Ormstoun
|
1 |
|
Orock
|
2 |
|
Orpe
|
1 |
|
Orrock
|
105 |
|
Orrock*
|
1 |
|
Orrok
|
77 |
|
Osborne
|
1 |
|
Osterhaut
|
3 |
|
Otes
|
1 |
|
Oughtred
|
6 |
|
Outzen
|
1 |
|
Owen
|
2 |