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 |
|---|---|---|---|---|---|---|---|
| 19442 | O'reilly | William Patrick | W P | Private | 1st South African Infantry | 1918-10-16 | |
| 19447 | O'riordan | Terence | T | Gunner | South African Artillery (Corps) | 1942-10-25 | |
| 19486 | O'shea | Christopher Joseph | C J | Private | 2nd South African Infantry | "D" Coy. | 1918-04-15 |
| 19167 | Oakes | Allan George Tufnell | A G T | Lieutenant | 21 Squadron | 1943-07-03 | |
| 19168 | Oakes | Kenneth Tufnell | K T | Lieutenant | 24 Squadron | 1945-04-21 | |
| 19169 | Oakley | Herbert Harry | H H | Lieutenant | Special Service Battalion | 1944-10-20 | |
| 19170 | Oates | Edward Llewellyn | E L | Staff Sergeant | General Service Corps (Corps) | 1942-12-15 | |
| 19171 | Oates | Hilton Edgar | H E | Pupil Pilot | 21 Air School | 1941-09-24 | |
| 19174 | Oates | Leonard John | L J | Lieutenant | 1 Squadron | 1943-11-28 | |
| 32350 | Oates | Ronald Kitchener | R K | Pupil Pilot | South African Air Force (Corps) | AFS Swartkop | 1937-07-27 |
| 39749 | Oates | Taylor | T | Private | General and Base Depots | Base Depot | 1927-11-07 |
| 19176 | Oats | Fred | F | Private | Cape Corps | 1st | 1918-10-11 |
| 19177 | Oberholzer | Albertus Petrus Johannes | A P J | Corporal | Q Service Corps (Corps) | 1940-08-01 | |
| 19178 | Oberholzer | Jan Andries | J A | Rifleman | South African Mounted Rifles | 1st Regiment | 1918-10-24 |
| 19179 | Oberholzer | MacHiel Adriaan | M A | Sergeant | Mounted Commandos | Brand's Horse | 1914-11-20 |
| 19180 | Oberholzer | Michael Adrian | M A | Lieutenant | 21 Squadron | 1941-12-12 | |
| 19181 | Oberholzer | Michael Johannes | M J | Trooper | South African Armoured Corps (Corps) | 8th "A" Brigade Group | 1942-10-27 |
| 19182 | Oberholzer | Nicolaas Tjaart | N T | Sergeant | South African Horse | 7th | 1916-09-07 |
| 19183 | Oberholzer | Sarel Gerhardus | S G | Private | 8th South African Infantry | 1917-07-13 | |
| 19184 | Oberholzer | Sarel Johannes Jacobus | S J J | Lance Bombardier | South African Artillery (Corps) | 1942-07-03 | |
| 19185 | Oberholzer | W C | Private | Protectorate Garrison Regiment | "B" Coy. | 1918-10-18 | |
| 19186 | Oberholzer | William Daniel | W D | Lance Corporal | 1st South African Infantry | 1918-04-10 | |
| 19187 | Oberholzer | Zacharias Petrus | Z P | Corporal | South African Corps of Military Police (Corps) | 1945-04-30 | |
| 19188 | Obermeyer | B | Corporal | Cape Corps | 1941-05-06 | ||
| 19189 | Obermeyer | Jacob Barend | J B | Driver | South African Service Corps (Corps) | M.t. | 1919-02-10 |
| 19190 | Oborne | Alfred Frank | A F | Captain | Rand Light Infantry | 1st | 1942-10-23 |
| 41430 | Obose | Gideon | G | Native Constable | South African Mounted Rifles | 1st Regiment | 1919-10-19 |
| 19191 | Obree | William Henry | W H | Air Mechanic | South African Air Force (Corps) | 1941-08-18 | |
| 19209 | Obusitse | Daniel | D | Private | South African Native Labour Corps (Corps) | 1941-09-14 | |
| 19212 | Ochse | Arthur Edward | A E | Corporal | 2nd South African Infantry | 1918-04-11 | |
| 19230 | October | Apools | A | Private | Cape Corps | 1944-11-22 | |
| 19231 | October | Andrew | A | Private | Cape Corps | 1943-03-23 | |
| 19232 | October | Arthur William | A W | Private | Cape Corps | 1943-03-08 | |
| 19233 | October | Dampie | D | Private | Indian and Malay Corps (Corps) | 1943-10-29 | |
| 19234 | October | Daniel | D | Private | Cape Corps | 1st | 1917-11-08 |
| 19235 | October | Kayser | K | Private | South African Native Labour Corps (Corps) | 1941-11-04 | |
| 19236 | October | Martinus | M | Private | Cape Corps | 2nd | 1918-10-11 |
| 19237 | October | Samuel | S | Private | Cape Corps | 1945-04-19 | |
| 19238 | October | Willem Jacobus | W J | Private | Cape Corps | 1945-02-01 | |
| 41058 | October | Morris | M | Labourer | South African Native Labour Corps (Corps) | Railways and Harbours | 1916-06-15 |
| 19241 | Oddie | Alistair Crompton Williams | A C W | Lieutenant | 34 Squadron | 1944-11-23 | |
| 19247 | Odendaal | I | Private | Indian and Malay Corps (Corps) | 1942-12-01 | ||
| 19248 | Odendaal | Izak Johannes Meyer | I J M | Major | 31 Squadron | 1944-08-17 | |
| 19249 | Odendaal | Jacobus Petrus | J P | Private | Regiment Botha | 1940-07-22 | |
| 19250 | Odendaal | Norman Frederick | N F | Second Lieutenant | 15 (R.A.F.) Squadron | 1945-03-10 | |
| 19251 | Odendaal | Wessel Nicholaas | W N | Corporal | 8th South African Infantry | 1917-07-23 | |
| 19252 | Odendaal | William Peter | W P | Private | Imperial Light Horse/Kimberley Regiment | 1944-07-26 | |
| 19260 | Oelofse | Hendrik Gerhardus Petrus | H G P | Captain | Q Service Corps (Corps) | 1947-05-19 | |
| 19261 | Oelofse | Jan Hendrik | J H | Private | 6th South African Infantry | "A" Coy. | 1917-05-11 |
| 19264 | Oelofse | M N | Bombardier | South African Artillery (Corps) | 4 Field Regiment | 1942-06-15 |