| Surname | Individuals |
|---|---|
|
Obaze
|
3 |
|
Oddleifsdóttir
|
2 |
|
Oddleifsson
|
1 |
|
Oddnýjardóttir
|
1 |
|
Oddsdóttir
|
5 |
|
Oddsson
|
9 |
|
Oders
|
1 |
|
Oggesen
|
1 |
|
Olesen
|
4 |
|
Olofsdotter
|
3 |
|
Olofsson
|
5 |
|
Olsdatter
|
10 |
|
Olsen
|
18 |
|
Olufdatter
|
1 |
|
Olufsdatter
|
1 |
|
Oppermann
|
1 |
|
Ormsdóttir
|
4 |
|
Ormsson
|
11 |
|
Otto
|
1 |
|
Outesen
|
1 |
|
Ovesen
|
1 |
|
Óargi
|
1 |
|
Ófeigsson
|
2 |
|
Ólafsdóttir
|
20 |
|
Ólafsson
|
26 |
|
Óleifsson
|
1 |
|
Ósvífursdóttir
|
1 |
|
Ögmundsdóttir
|
3 |
|
Ögmundsson
|
2 |
|
Örnólfsdóttir
|
1 |
|
Örnólfsson
|
2 |
|
Össurardóttir
|
1 |
|
Özurardóttir
|
1 |
