| Surname | Patriarch Help | Individuals |
|---|---|---|
|
O'Connor
|
|
1 |
|
O'Meara
|
|
1 |
|
O'Meara-Shakespeare
|
Roger Joseph Balemi 1930– |
1 |
|
O'Neill
|
Kerry Leonard O'Neill 1948– |
7 |
|
Olasz
|
|
1 |
|
Ormos
|
|
1 |
|
Osi
|
|
1 |
|
Oszkay
|
|
1 |