| Surname | Individuals |
|---|---|
|
O'Dell
|
1 |
|
O'Hair
|
1 |
|
Oberlin
|
5 |
|
Ocel
|
5 |
|
Offenberger
|
6 |
|
Offenburger
|
1 |
|
Offett
|
1 |
|
Officer
|
1 |
|
Oglevee
|
5 |
|
Olderman
|
1 |
|
Olesdatter
|
2 |
|
Ollie
|
1 |
|
Olsen
|
7 |
|
Oltz
|
1 |
|
Omagene
|
1 |
|
Omspacher
|
5 |
|
Orcutt
|
1 |
|
Orians
|
1 |
|
Orin
|
1 |
|
Orr
|
8 |
|
Orth
|
2 |
|
Orum
|
1 |
|
Orwick
|
1 |
|
Osborn
|
2 |
|
Osborne
|
3 |
|
Ossler
|
32 |
|
Ossont
|
1 |
|
Otley
|
1 |
|
Ottaviand
|
1 |
|
Owen
|
9 |
|
Owens
|
1 |
|
Oyer
|
1 |
|
Oyster
|
1 |