1 OBrien;   (Aaron Warren OBrien)
2 Oakley;   (Ben Stephen Oakley)
3 Oxenford;   (Bruce Nicholas James Oxenford)
4 Orchard;   (David Lynton Orchard)
5 O'Neill;   (Fergus O'Neill)
6 Orr;   (James Patrick Orr)
7 O'Connor;   (John Denis Alphonsus O'Connor)
8 O'Keeffe;   (Kerry James O'Keeffe)
9 O'Brien;   (Leo Patrick Joseph O'Brien)
10 O'Brien;   (Leslie O'Brien Fleetwood-Smith)
11 O'Connor;   (Liam Nicholas O'Connor)
12 Owen;   (Mitchell J Owen)
13 O'Neill;   (Norman Clifford Louis O'Neill)
14 Oliver;   (Oliver Davies)
15 Otto;   (Otto Ernest Nothling)
16 Oxenham;   (Ronald Keven Oxenham)
17 Oliver;   (Scott Oliver Henry)
18 O'Donnell;   (Simon Patrick O'Donnell)
19 OKeefe;   (Stephen Norman John OKeefe)
20 O'Connell;   (Thomas Lachlan O'Connell)
21 Oswald;   (William Oswald Whitridge)
22 Oldfield;   (William Albert Stanley Oldfield)
23 O'Reilly;   (William Joseph O'Reilly)