| Person # | Last Name | First Name | Initials | Rank | Year |
|---|---|---|---|---|---|
| 19380 | O'meara | James Justin | J J | Corporal | 1916 |
| 19379 | O'meara | John | J | Sergeant | 1916 |
| 19381 | O'meara | Michael Henry | M H | Corporal | 1918 |
| 19384 | O'neil | G F | Sapper | 1945 | |
| 19385 | O'neil | J P | Private | 1941 | |
| 19383 | O'neil | Frederick | F | Second Lieutenant | 1916 |
| 19386 | O'neill | Charles Cecil | C C | Private | 1916 |
| 40153 | O'neill | Gert Stephanus | G S | Trooper | 1979 |
| 32382 | O'neill | Johannes Albertus | J A | Private | 1982 |
| 40154 | O'neill | Keith | K | Private | 1977 |
| 40155 | O'neill | Michael Patrick | M P | Staff Sergeant | 1969 |
| 19387 | O'neill | Richard Patrick | R P | Private | 1921 |
| 19438 | O'regan | Cyril Dominic | C D | Lance Corporal | 1941 |
| 19439 | O'reilly | Justin | J | Private | 1918 |
| 19440 | O'reilly | Keith Henry | K H | Lieutenant | 1941 |
| 19441 | O'reilly | Patrick | P | Private | 1917 |
| 40159 | O'reilly | Patrick Malcolm | P M | Lance Corporal | 1976 |
| 40158 | O'reilly | Peter Albertus | P A | Acting Sergeant | 1975 |
| 19442 | O'reilly | William Patrick | W P | Private | 1918 |
| 19447 | O'riordan | Terence | T | Gunner | 1942 |
| 19486 | O'shea | Christopher Joseph | C J | Private | 1918 |
| 19487 | O'shea | Harry Arthur | H A | Lieutenant | 1918 |
| 19166 | Oakes | Alexander Montague | A M | Private | 1915 |
| 19167 | Oakes | Allan George Tufnell | A G T | Lieutenant | 1943 |
| 19168 | Oakes | Kenneth Tufnell | K T | Lieutenant | 1945 |
| 19169 | Oakley | Herbert Harry | H H | Lieutenant | 1944 |
| 32349 | Oarum | Sakhile Obed | J | Rifleman | 1980 |
| 19170 | Oates | Edward Llewellyn | E L | Staff Sergeant | 1942 |
| 19171 | Oates | Hilton Edgar | H E | Pupil Pilot | 1941 |
| 19172 | Oates | John Gerald Beveridge | J G B | Master | 1945 |
| 19173 | Oates | Joshua Laurence | J L | Sub-Lieutenant | 1916 |
| 19174 | Oates | Leonard John | L J | Lieutenant | 1943 |
| 19175 | Oates | Reginald John Stafford | R J S | Rifleman | 1915 |
| 32350 | Oates | Ronald Kitchener | R K | Pupil Pilot | 1937 |
| 39749 | Oates | Taylor | T | Private | 1927 |
| 40990 | Oates | Thomas Herbert Beveridge | T H B | Lieutenant | 1941 |
| 19176 | Oats | Fred | F | Private | 1918 |
| 32351 | Obbes | Gideon M F | G M F | Trooper | 1975 |
| 19185 | Oberholzer | W C | Private | 1918 | |
| 19177 | Oberholzer | Albertus Petrus Johannes | A P J | Corporal | 1940 |
| 32352 | Oberholzer | Antonie | A | Corporal | 1980 |
| 37035 | Oberholzer | Ben | G J | Inspector | 2004 |
| 41136 | Oberholzer | Christiaan Lourens | C L | Signaller | 1980 |
| 32353 | Oberholzer | Francois Paul | F P | Private | 1992 |
| 37036 | Oberholzer | Isak Johannes | I J | Constable | 1918 |
| 19178 | Oberholzer | Jan Andries | J A | Rifleman | 1918 |
| 37037 | Oberholzer | Johannes Hendrik | J H | Constable | 1975 |
| 32354 | Oberholzer | Lodewikus Johannes | L J | Rifleman | 1977 |
| 41574 | Oberholzer | Lourens Martinus | L M | Colonel | 1963 |
| 19179 | Oberholzer | Machiel Adriaan | M A | Sergeant | 1914 |