| # | Last Name | First Name | Initials | Rank | Regiment | Locality | Date of Death |
|---|---|---|---|---|---|---|---|
| 37038 | Oberholzer | Magnus | M | Constable | Free State | 1993-12-05 | |
| 37039 | Oberholzer | Sarel Jacobus Burger | S J B | Constable | Gauteng | 1994-10-20 | |
| 41136 | Oberholzer | Christiaan Lourens | C L | Signaller | 2 Signal Regiment | Free State | 1980-02-01 |
| 41574 | Oberholzer | Lourens Martinus | L M | Colonel | 1963-07-13 | ||
| 45459 | Oberholzer | Pieter Michiel | P M | Burgher | Vrede Commando | 1901-03-28 | |
| 45460 | Oberholzer | Daniel Carel | D C | Burgher | Marico Commando | 1900-01-26 | |
| 45461 | Oberholzer | Izaak Gerhardus | I G | Burgher | Fauresmith | 1901-07-20 | |
| 45462 | Oberholzer | Jacob Johannes | J J | Burgher | Boer Forces | 1901-12-27 | |
| 45463 | Oberholzer | Christiaan H. | C H | Burgher | Winburg Commando | 1900-01-26 | |
| 45464 | Oberholzer | Arie Gerhardus | A G | Burgher | Groot Marico Commando | 1900-07-14 | |
| 45465 | Oberholster | A.j. | A | Burgher | Johannesburg | 1900-02-27 | |
| 32351 | Obbes | Gideon M F | G M F | Trooper | South African Armoured Corps (Corps) | Western Cape | 1975-11-24 |
| 19176 | Oats | Fred | F | Private | Cape Corps | Northern Cape | 1918-10-11 |
| 19170 | Oates | Edward Llewellyn | E L | Staff Sergeant | General Service Corps (Corps) | KwaZulu-Natal | 1942-12-15 |
| 19171 | Oates | Hilton Edgar | H E | Pupil Pilot | 21 Air School | Free State | 1941-09-24 |
| 32350 | Oates | Ronald Kitchener | R K | Pupil Pilot | South African Air Force (Corps) | Gauteng | 1937-07-27 |
| 39749 | Oates | Taylor | T | Private | General and Base Depots | Gauteng | 1927-11-07 |
| 45466 | Oates | Thomas (tom) | T ( | Burgher | Irish Brigade Commando | 1899-10-20 | |
| 32349 | Oarum | J | Rifleman | 41 Battalion | Gauteng | 1980-03-30 | |
| 19442 | O'reilly | William Patrick | W P | Private | 1st South African Infantry | North West | 1918-10-16 |
| 19387 | O'neill | Richard Patrick | R P | Private | 4th South African Infantry | Gauteng | 1921-06-12 |
| 32382 | O'neill | Johannes Albertus | J A | Private | South African Ordnance Services Corps (Corps) | Free State | 1982-09-04 |
| 19384 | O'neil | G F | Sapper | South African Engineer Corps (Corps) | Western Cape | 1945-08-27 | |
| 19379 | O'meara | John | J | Sergeant | 5th South African Infantry | KwaZulu-Natal | 1916-11-11 |
| 19304 | O'leary | Kevin Leahy | K L | Captain | South African Air Force (Corps) | Gauteng | 1945-07-08 |
| 32365 | O'gorman | Brian Alphonso | B A | Airman | South African Air Force (Corps) | Gauteng | 1965-07-02 |
| 19255 | O'donoghue | James Michael | J M | Corporal | Prince Alfred's Guard | KwaZulu-Natal | 1942-07-07 |
| 19257 | O'donoghue | Patrick Roderick | P R | Private | 9th South African Infantry | Western Cape | 1916-12-03 |
| 19253 | O'donnell | James | J | Private | South African Horse | Gauteng | 1918-01-23 |
| 19246 | O'dell | D F | Private | Technical Service Corps (Corps) | Western Cape | 1947-06-26 | |
| 19242 | O'dea | Daniel | D | Corporal | Technical Service Corps (Corps) | KwaZulu-Natal | 1943-04-08 |
| 19240 | O'daly | Charles Nicholas Frederick | C N F | Dresser | South African Veterinary Corps (Corps) | KwaZulu-Natal | 1917-05-04 |
| 19223 | O'connor | Gilbert Rademan | G R | Major | South African Army Postal Corps (Corps) | Gauteng | 1942-11-29 |
| 19226 | O'connor | James Mathew | J M | Lance Corporal | 9th Infantry (Prince of Wales' Own Regiment of Cape Peninsula Rifles) | Western Cape | 1920-11-04 |
| 19227 | O'connor | Robert Emmet | R E | Private | 1st South African Infantry | Eastern Cape | 1918-10-12 |
| 32356 | O'connor | Walter Donald | W D | Rifleman | South African Commandos | Free State | 1979-12-15 |
| 32357 | O'connor | Desmond | D | Lieutenant | 19 Squadron | Northern Cape | 1981-09-29 |
| 37040 | O'connor | Albert Cortney Michael | A C M | Plain Clothes Constable | Gauteng | 1922-05-11 | |
| 19213 | O'connell | Daniel | D | Private | 1st South African Infantry | North West | 1918-10-26 |
| 19216 | O'connell | William Joseph Andrew | W J A | Private | Essential Services Protection Corps (Corps) | Western Cape | 1943-11-17 |
| 5588 | O'brien Despard | William Hugh | W H | Corporal | South African Mounted Rifles | Gauteng | 1920-01-07 |
| 19196 | O'brien | George William | G W | Corporal | Cape Garrison Artillery | Western Cape | 1918-10-11 |
| 19198 | O'brien | Joseph Gerald | J G | Air Mechanic | South African Air Force (Corps) | Gauteng | 1942-02-05 |
| 19199 | O'brien | Kevin Laserian Coker | K L C | Pupil Pilot | 21 Air School | Gauteng | 1942-01-26 |
| 19201 | O'brien | Michael Joseph | M J | Private | Essential Services Protection Corps (Corps) | Gauteng | 1940-06-11 |
| 19206 | O'brien | Thomas Vincent | T V | Sergeant | Camp Commandants Staff | Gauteng | 1918-08-11 |
| 49440 | O'Shaughnessey | John | J | Trooper | Border Horse | 1900-05-22 | |
| 49617 | O'Reilly | John Theodore | J T | Trooper | Brabant's Horse | 1900-04-14 | |
| 49578 | O'Flaherty | H H | H H | Captain | Commander-in-Chief's Bodyguard | 1901-07-26 | |
| 45384 | O' Reilly | William Hedding | W H | Burgher | Wolmaransstad Commando | 1901-08-16 |