South African and related defence-force eras recorded on the roll. SAP, SAPS, and SWAPOL are tagged as Forces. Merchant navy and civilian war-dead are left blank. Foreign and Boer units are tagged when the regiment name is unambiguous (e.g. Australian Field Artillery → AUS).
The Union Defence Force was established on 1 July 1912 under the South Africa Defence Act, 1912, after the Union of South Africa (1910). It brought together the colonial and Boer military forces of the Cape, Natal, Transvaal and Orange Free State. The UDF served in the First World War (including German South-West Africa, East Africa, and the Western Front) and the Second World War. It was replaced by the South African Defence Force on 1 November 1957.
Wikipedia| # | Last Name | First Name | Initials | Rank | Regiment | Unit | Date of Death |
|---|---|---|---|---|---|---|---|
| 19390 | Onslow-Carleton | WILLIAM McNEILL | W M | Honorary Captain | Civilian War Dead | South African Forces | 1918-10-04 |
| 19391 | Onverwacht | J | Private | Indian and Malay Corps (Corps) | 1943-04-16 | ||
| 19392 | Onverwagt | M | Private | Indian and Malay Corps (Corps) | 1942-08-24 | ||
| 19394 | Oostermeyer | John James | J J | Private | 4th South African Infantry | 1917-04-09 | |
| 19395 | Oosthuizen | Adriaan S | A S | Gunner | South African Artillery (Corps) | 1943-01-31 | |
| 19396 | Oosthuizen | B J | Warrant Officer Class II | South African Air Force (Corps) | 1946-01-05 | ||
| 19397 | Oosthuizen | Christian B | C B | Pupil Pilot | 25 Air School | 1942-07-24 | |
| 19398 | Oosthuizen | Christian Frederick | C F | Lance Corporal | South African Medical Corps (Corps) | 1941-12-19 | |
| 19399 | Oosthuizen | Cornelius Jacobus | C J | Private | 8th Infantry (Transvaal Scottish) | "B" Coy. | 1914-12-05 |
| 19400 | Oosthuizen | Daniel Jacobus | D J | Lieutenant | South African Service Corps (Corps) | Animal Transport | 1918-04-26 |
| 19401 | Oosthuizen | G J D | Air Corporal | South African Air Force (Corps) | 1946-07-30 | ||
| 19402 | Oosthuizen | Hendrik Jacobus | H J | Air Sergeant | 12 Squadron | 1941-08-21 | |
| 19403 | Oosthuizen | Hendrik Paul | H P | Lieutenant | 26 Squadron | 1944-10-03 | |
| 19404 | Oosthuizen | J | Private | Cape Corps | 1945-04-10 | ||
| 19405 | Oosthuizen | Johannes | J | Native Driver | South African Field Artillery | 1st Bty. | 1916-07-11 |
| 19406 | Oosthuizen | J C | Air Mechanic | South African Air Force (Corps) | 1942-01-22 | ||
| 19407 | Oosthuizen | Jacobus Carel Johannes | J C J | Gunner | South African Artillery (Corps) | 1st Light Bty. | 1939-11-25 |
| 19408 | Oosthuizen | Jan F | J F | Corporal | Q Service Corps (Corps) | 1943-08-28 | |
| 19409 | Oosthuizen | J J | Sapper | South African Engineer Corps (Corps) | 1942-11-28 | ||
| 19410 | Oosthuizen | John Jacobus | J J | Private | 3rd South African Infantry | 1917-09-21 | |
| 19411 | Oosthuizen | Lourens Daniel | L D | Private | First City/Cape Town Highlanders | 1944-09-01 | |
| 19412 | Oosthuizen | Nicholaas Johannes | N J | Rifleman | South African Mounted Rifles | 1st Regiment | 1918-10-25 |
| 19413 | Oosthuizen | Nicholas Jacobus | N J | Burgher | Mounted Commandos | Frankfort Commando | 1914-12-18 |
| 19414 | Oosthuizen | Nico J | N J | Warrant Officer Class II | South African Artillery (Corps) | 1946-06-25 | |
| 19415 | Oosthuizen | Nicolaas Jozephus | N J | Private | 1st Reserve Brigade | 1941-08-09 | |
| 19416 | Oosthuizen | Ockert Thomas | O T | Private | 1st South African Infantry | 1918-10-21 | |
| 19417 | Oosthuizen | Stephanus Johannes | S J | Lieutenant | Witwatersrand Rifles/Regiment de la Rey | 1944-10-13 | |
| 19418 | Oosthuizen | Thomas Phillipus | T P | Corporal | South African Horse | 1st | 1916-08-20 |
| 19419 | Oosthuizen | Willem T | W T | Private | South African Medical Corps (Corps) | 1944-07-03 | |
| 30131 | Oosthuizen | Martinus Johannes | M J | Constable | Transvaal Police | 5 South African Infantry Battalion | 1915-11-06 |
| 32392 | Oosthuizen | Jacobus Johannes | J J | Private | Special Service Battalion | Wynberg | 1938-12-17 |
| 19420 | Oosthuyse | Dietlof Jacobus | D J | Burgher | Mounted Commandos | Ermelo "B" Commando | 1915-03-20 |
| 19421 | Oosthuyse | Johan Bernard | J B | Private | South African Mounted Brigade Scouts | 2nd | 1916-04-15 |
| 19422 | Oosthuyse | Nicolaas Johannes | N J | Lieutenant | Royal Natal Carbineers | 1944-10-20 | |
| 19423 | Openshaw | Frank Arthur Roland | F A R | Private | South African Irish | 1st Bn. | 1941-12-09 |
| 19424 | Openshaw | Herbert Douglas | H D | Private | 2nd South African Infantry | "E" Coy. | 1916-07-16 |
| 19425 | Openshaw | Sydney J | S J | Sergeant | South African Corps of Military Police (Corps) | 1941-05-25 | |
| 32399 | Openshaw | Roger Montague | R M | Pupil Pilot | South African Air Force (Corps) | 1939-02-20 | |
| 19427 | Opperman | A | South West African Infantry Battalion | 1939-09-03 | |||
| 19428 | Opperman | Albert Stephen Abraham | A S A | Burgher | Mounted Commandos | Geyser's Commando | 1914-11-25 |
| 19429 | Opperman | Daniel Johannes | D J | Private | Cape Corps | 2nd | 1918-04-01 |
| 19430 | Opperman | Daniel Jacobus Elardus | D J E | Burgher | Mounted Commandos | Botha's Commando | 1914-11-08 |
| 19431 | Opperman | Francis Gerhardus Johannes | F G J | Private | 5th South African Infantry | "A" Coy. | 1917-06-14 |
| 19432 | Opperman | Petrus Gerhardus | P G | Private | 9th Infantry (Prince of Wales' Own Regiment of Cape Peninsula Rifles) | 1918-10-17 | |
| 19433 | Opperman | William | W | Leader | South African Native Labour Corps (Corps) | 1917-04-24 | |
| 19434 | Orchison | David W | D W | Second Lieutenant | South African Air Force (Corps) | 1945-01-09 | |
| 19435 | Ord | Edward | E | Corporal | South African Ordnance Services Corps (Corps) | 1915-02-25 | |
| 19443 | Orffer | Johannes Francois | J F | Private | Cape Town Highlanders | 1942-10-24 | |
| 19445 | Orgill | Claude Morris | C M | Able Seaman | South African Navy (Corps) | H.M.S.A.S. Bonaventure | 1943-05-14 |
| 19446 | Orgill | J N | Private | Cape Corps | 1945-11-02 |