| Surname | Individuals |
|---|---|
|
O' Brien
|
1 |
|
O' Hara
|
1 |
|
O' Shaughnessy
|
1 |
|
O'Brien
|
9 |
|
O'Callaghan
|
1 |
|
O'Connel
|
2 |
|
O'Connell
|
3 |
|
O'Connor
|
1 |
|
O'Dell
|
1 |
|
O'Donnell
|
4 |
|
O'Dowd
|
2 |
|
O'Farrell
|
2 |
|
O'Flaherty
|
1 |
|
O'Grady
|
1 |
|
O'Haughnessy
|
1 |
|
O'Meara
|
11 |
|
O'Neil
|
13 |
|
O'Rourke
|
7 |
|
O-Brien
|
2 |
|
O-Connor
|
1 |
|
OBrien
|
7 |
|
Obideau
|
1 |
|
Oboulin
|
1 |
|
Octeau
|
1 |
|
Oddson
|
10 |
|
Oddsson
|
15 |
|
Odette-Lapointe
|
1 |
|
Oertel
|
3 |
|
Oger
|
2 |
|
Oldsdotter
|
1 |
|
Oleson
|
1 |
|
Olive
|
1 |
|
Oliver
|
1 |
|
Olivier
|
8 |
|
Olney
|
5 |
|
Olscamps
|
1 |
|
Olson
|
5 |
|
Omelet
|
1 |
|
Omract
|
1 |
|
Ondoyer
|
1 |
|
Oneschuk
|
2 |
|
Ongbabolak
|
1 |
|
Ordelia
|
1 |
|
Ordway
|
2 |
|
Orfroy
|
1 |
|
Orillon
|
1 |
|
Orion
|
25 |
|
Orion-Champagne
|
2 |
|
Ormandy
|
3 |
|
Ortuso
|
4 |
|
Oryell
|
1 |
|
Oré
|
1 |
|
Osborne
|
1 |
|
Ossant
|
1 |
|
Otis
|
2 |
|
Ottman
|
7 |
|
Otwell
|
5 |
|
Oudin
|
1 |
|
Oudinat
|
1 |
|
Ouellet
|
76 |
|
Ouellett
|
2 |
|
Ouellette
|
50 |
|
Ouillette
|
9 |
|
Ouimet
|
42 |
|
Ouimette
|
7 |
|
Oulette Helie
|
1 |
|
Oullette
|
2 |
|
Oulton
|
3 |
|
Outer
|
1 |
|
Ouvrard
|
4 |
|
Ouymet
|
1 |
|
Overall
|
2 |