| Surname | Individuals |
|---|---|
|
O Brissell
|
1 |
|
O'Brissell
|
1 |
|
Oberdorf
|
1 |
|
Oberholtzer
|
4 |
|
Ochsenfurter
|
1 |
|
Odenwalt
|
1 |
|
Offasdatter
|
1 |
|
Ogden
|
3 |
|
Ohlsdotter
|
1 |
|
Oldenwald
|
1 |
|
Olesdatter
|
2 |
|
Olesen
|
3 |
|
Oliver
|
2 |
|
Ollyver
|
1 |
|
Olmstead
|
7 |
|
Olmsted
|
2 |
|
Olofsdotter
|
7 |
|
Olofsdr
|
1 |
|
Olofsson
|
8 |
|
Ols Dr
|
1 |
|
Olsdotter
|
8 |
|
Olsdr
|
1 |
|
Olsen
|
2 |
|
Olson
|
2 |
|
Olsson
|
3 |
|
Olstrom
|
8 |
|
Olufsdotter
|
3 |
|
Olufsson
|
4 |
|
Olufsson Kropp
|
1 |
|
Opdyck
|
5 |
|
Opdyke
|
2 |
|
Ordgar
|
1 |
|
Orlady
|
1 |
|
Orsborn
|
1 |
|
Osbom
|
1 |
|
Osborn
|
10 |
|
Osborne
|
41 |
|
Osborne III (12)
|
1 |
|
Osgood
|
1 |
|
Ottinger
|
3 |
|
Ottosson
|
2 |
|
Oudelant
|
2 |
|
Oweans
|
1 |
|
Owen
|
9 |
|
Owens
|
7 |
|
Oxfordshire
|
1 |
|
Oyler
|
1 |
|
of Baer Bar Bare
|
1 |
|
of Bukenthall
|
1 |
|
of Mercia
|
1 |
|
of Powhatan
|
1 |