| Person # | Last Name | First Name | Initials | Rank | Regiment | Date of Death |
|---|---|---|---|---|---|---|
| 37036 | Oberholzer | Isak Johannes | I J | Constable | South African Police | 1918-10-26 |
| 19178 | Oberholzer | Jan Andries | J A | Rifleman | South African Mounted Rifles | 1918-10-24 |
| 19186 | Oberholzer | William Daniel | W D | Lance Corporal | South African Infantry | 1918-04-10 |
| 19212 | Ochse | Arthur Edward | A E | Corporal | South African Infantry | 1918-04-11 |
| 19236 | October | Martinus | M | Private | Cape Corps | 1918-10-11 |
| 37043 | Odendaal | Hendrik Jacobus | H J | 2nd Class Sergeant | South African Police | 1918-11-10 |
| 37050 | Oelofse | Roelof Petrus | R P | Constable | South African Police | 1918-10-04 |
| 19266 | Oelson | Robert Thomas | R T | Bombardier | Cape Garrison Artillery | 1918-10-14 |
| 19276 | Ogilvie | George Swan | G S | Lance Corporal | South African Infantry | 1918-05-29 |
| 19279 | Ogle | William | W | Driver | Cape Auxiliary Horse Transport | 1918-10-09 |
| 19290 | Okey | Francis Henry | F H | Sapper | South African Signal Service | 1918-12-08 |
| 19293 | Oldale | Charles H | C H | Sapper | South African Engineers | 1918-10-22 |
| 19295 | Oldfield | Arthur James | A J | Gunner | South African Field Artillery | 1918-12-17 |
| 19300 | Oldham | Milton | M | Corporal | King's Royal Rifle Corps | 1918-07-05 |
| 40566 | Oliphant | Henry | H | Native Constable | South African Mounted Rifles | 1918-10-21 |
| 19331 | Oliver | John | J | Private | Cape Corps | 1918-09-20 |
| 19332 | Oliver | John | J | Private | South African Infantry | 1918-10-22 |
| 19334 | Oliver | John Henry | J H | Sapper | South African Signal Service | 1918-10-28 |
| 19339 | Olivier | Alexander Benjamin | A B | Constable | South African Military Constabulary | 1918-10-28 |
| 19344 | Olivier | Gieleam | G | Private | South African Medical Corps | 1918-10-08 |
| 19349 | Olivier | Jacob | J | Private | Cape Corps | 1918-05-26 |
| 19354 | Olivier | Nicholas Johannes | N J | Constable | South African Military Constabulary | 1918-10-27 |
| 19356 | Olivier | Paul Arthur | P A | Private | South African Infantry | 1918-06-10 |
| 19389 | Onslow-Carleton | Christopher John | C J | Civilian | Civilian | 1918-10-04 |
| 19390 | Onslow-Carleton | William McNeill | W M | Honorary Captain | Civilian War Dead | 1918-10-04 |
| 19400 | Oosthuizen | Daniel Jacobus | D J | Lieutenant | South African Service Corps | 1918-04-26 |
| 19412 | Oosthuizen | Nicholaas Johannes | N J | Rifleman | South African Mounted Rifles | 1918-10-25 |
| 19416 | Oosthuizen | Ockert Thomas | O T | Private | South African Infantry | 1918-10-21 |
| 19429 | Opperman | Daniel Johannes | D J | Private | Cape Corps | 1918-04-01 |
| 19432 | Opperman | Petrus Gerhardus | P G | Private | 9th Infantry (Prince of Wales' Own Regiment of Cape Peninsula Rifles) | 1918-10-17 |
| 19453 | Ormsby | Richard Gilbert | R G | Private | 1st King Edward's Horse | 1918-10-19 |
| 19474 | Orton | Willie | W | Private | South African Infantry | 1918-07-21 |
| 19476 | Osborne | Ernest William | E W | Private | South African Infantry | 1918-04-10 |
| 19484 | Oschmann | Julius Hendrik | J H | Private | South African Infantry | 1918-03-22 |
| 19490 | Osler | Martin Jacobus Van Dyk | M J V D | Private | South African Medical Corps | 1918-10-29 |
| 19494 | Osmond | Reuben Harding | R H | Lance Corporal | South African Infantry | 1918-03-27 |
| 19511 | Otto | Sabrand Johannes | S J | Trooper | Protectorate Garrison Regiment | 1918-10-08 |
| 19519 | Outram | George Lance | G L | Sergeant | British South African Police | 1918-10-25 |
| 19523 | Overgage | George Edwin | G E | Lance Corporal | South African Infantry | 1918-10-08 |
| 19532 | Owen | Godfrey Felix | G F | Lieutenant | South African Mounted Rifles | 1918-10-30 |
| 19539 | Owen | Ronald James | R J | Sergeant | South African Mounted Rifles | 1918-10-24 |
| 19540 | Owen | William John | W J | Gunner | South African Heavy Artillery | 1918-11-01 |
| 19558 | Paddock | James Rex | J R | Private | South African Infantry | 1918-10-14 |
| 19564 | Paff | Pauline Hermione Emily | P H E | Probationer Nurse | South African Military Nursing Service | 1918-10-20 |
| 19568 | Page | Ernest | E | Lance Sergeant | Royal Inniskilling Fusiliers | 1918-03-21 |
| 19596 | Palmer | Cecil Owen | C O | Lieutenant (Observer) | Royal Naval Air Service | 1918-02-26 |
| 19599 | Palmer | Edward Anderson | E A | Second Lieutenant | Worcestershire Regiment | 1918-10-14 |
| 19604 | Palmer | Leonard | L | Second Lieutenant | South African Infantry | 1918-02-14 |
| 19605 | Palmer | Lorimer Albert | L A | Corporal | South African Medical Corps | 1918-07-04 |
| 19612 | Palmer | William Leslie | W L | Private | South African Infantry | 1918-04-10 |