| Surname | Forename | Nick Name | DOB | DOD |
|---|---|---|---|---|
| O'Brien | John Alan | "Mongrel" | 15-Apr-53 | 20-Dec-93 |
| Obst | Warren Shawn | 02-Nov-66 | 30-Aug-19 | |
| O'Connor | Shane Raymond | "Bluey" | 03-Feb-72 | 24-Jul-18 |
| O'Connor | Trevor Raymond | "The Old Man" | 10-Sep-38 | 14-Mar-07 |
| O'Daniel | Edward Neil | "Neil" | 08-May-49 | 01-Jun-94 |
| O'Donnell | George Henry | "Harry" | 23-Feb-10 | 05-Jul-70 |
| O'Donnell | Kevin John | "Lunch" | 14-Jun-68 | 23-Nov-94 |
| O'Keefe | Cornelius William | "Con" | 29-Sep-44 | 23-Dec-14 |
| Ojczyk | Tadeusz | "Ted" | 14-Aug-51 | 26-Aug-07 |
| Oldfield | Aussie | 22-Nov-25 | 05-Jun-08 | |
| Oliver | Geoffrey Ronald | "Pumpa" | 28-Jul-48 | 15-Aug-02 |
| Olsen | Clyde William | 27-Dec-25 | 21-Jul-02 | |
| Ommundson | David John | "Ommo" | 09-Sep-49 | 07-Apr-90 |
| Oneile | Robert Leslie | 31-May-43 | 08-Jul-04 | |
| Onslow | Maurice Andrew | 18-Oct-29 | 31/Oct-70 | |
| Onslow | Robert Steven | "Bob" | 30-Nov-47 | 16-Apr-71 |
| Ormsby | James Percy Gore | "Jim" | 20-Mar-32 | 31-Oct-71 |
| Osborne | Paul Christian | "Shagga - Aussie" | 26-Feb-73 | 11-Nov-05 |
| Osman | Barry John | 14-Aug-36 | 23-Jul-71 | |
| Ostler | Aubrey James | "Wodonga" | 05-Sep-52 | 28-Nov-22 |
| Oswald | Cameron Bruce | 26-Apr-19 | 04-Dec-67 | |
| O'Sullivan | Frank | "Zorba" | 22-Jun-29 | 13-Dec-76 |
| Overton | Peter John | "Pete" | 13-Sep-53 | 13-Feb-04 |
| Owen | William Ronald | "Billy" or "Mongeral" | 08-Jul-42 | 12-Apr-84 |
