| Surname | Individuals |
|---|---|
|
O'BRIEN
|
12 |
|
O'CALLAGHAN
|
2 |
|
O'CONNOR
|
8 |
|
O'DONNELL
|
3 |
|
O'FERRALL
|
1 |
|
O'GRADY
|
4 |
|
O'HALLORAN
|
1 |
|
O'HARE
|
1 |
|
O'KEEFFE
|
1 |
|
O'REILLY
|
8 |
|
O'ROURKE
|
1 |
|
O'SULLIVAN
|
1 |
|
O'TOOLE
|
1 |
|
OAKES
|
29 |
|
OAKLEY
|
3 |
|
OATEN
|
1 |
|
OATHAM
|
1 |
|
OBBARD
|
1 |
|
ODDIE
|
3 |
|
OGBORN
|
12 |
|
OGDEN
|
2 |
|
OGIER
|
15 |
|
OGILVIE
|
6 |
|
OGILVY
|
1 |
|
OGLE
|
3 |
|
OKE
|
1 |
|
OLD
|
2 |
|
OLDFIELD
|
3 |
|
OLDING
|
7 |
|
OLDREY
|
1 |
|
OLDRIDGE
|
2 |
|
OLDRIEVE
|
1 |
|
OLIPHANT
|
7 |
|
OLIVE
|
1 |
|
OLIVER
|
11 |
|
OLLIVER
|
3 |
|
ONIONS
|
1 |
|
ONSLOW
|
17 |
|
OPIE
|
1 |
|
OPPENHEIMER
|
1 |
|
ORAM
|
36 |
|
ORANGE
|
2 |
|
ORATIS
|
8 |
|
ORCHARD
|
1 |
|
ORFEUR
|
1 |
|
ORGAN
|
4 |
|
ORGILL
|
3 |
|
ORME
|
3 |
|
ORMEROD
|
1 |
|
ORMISTON
|
10 |
|
ORMONDROYD
|
2 |
|
ORPIN
|
1 |
|
ORR
|
4 |
|
ORTON
|
5 |
|
OSBORN
|
7 |
|
OSBORNE
|
3 |
|
OSIER
|
1 |
|
OSMAN
|
4 |
|
OSMER
|
3 |
|
OSWELL
|
6 |
|
OTLEY
|
1 |
|
OTTLEY
|
1 |
|
OTWAY
|
1 |
|
OUDOT
|
1 |
|
OUSELEY
|
3 |
|
OUTHWAITE
|
1 |
|
OVERS
|
1 |
|
OWEN
|
31 |
|
OWTRAM
|
1 |
|
OXLEY
|
1 |