| Surname | Individuals |
|---|---|
|
Obešterová
|
1 |
|
Ochs
|
1 |
|
Olah
|
2 |
|
Olejník
|
1 |
|
Olejníková
|
1 |
|
Onderčín
|
3 |
|
Onderčínová
|
1 |
|
Opalla
|
1 |
|
Orlowszka
|
1 |
|
Orlowszky
|
1 |
|
Ovseniková
|
1 |