| Orland | G G F | | | Source: QSA and KSA medal rolls | South African Constabulary |
| Orlandi | Guiseppi Da Campobosso | | | Volunteer from Italy serving with the Boer forces
Source: Anglo Boer War Museum database, August 2016 | Other volunteers |
| Orlandini | Harry Herold | | | Prisoner number: 18095
Captured: Vaalbankfontein 07 Nov 1900
Sent to: India, Bellary
Age: 21
Address: Vaalbankfontein
Source: Anglo Boer War Museum 2016 | Boer Forces |
| Orleans | Prince A Of | | Trooper | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Carbineers |
| Orlebar | W A | | Lieutenant | Demise: Died of disease - enteric fever 17 Feb 1900
Place: Ladysmith
Source: In Memoriam by S Watt | 19th (Queen Alexandra's Own Royal) Hussars |
| Orlebar | William Aubrey | | Lieutenant | QSA (1) DoL
Provisional list of recipients
Source: Ladysmith Siege Account and Medal Roll | 19th (Queen Alexandra's Own Royal) Hussars |
| Orlebar | William Aubrey | | Lieutenant | QSA (1). Died of disease, Ladysmith, 17 Feb 00 aged 21.
Source: QSA medal rolls | 19th (Queen Alexandra's Own Royal) Hussars |
| Orlebar | William Aubrey | | 2nd Lieutenant | He died in Ladysmith, February 17th, 1900. He was born March 1879, educated at Harrow, and entered the 19th Hussars in May 1898. He proceeded to South Africa with his regiment from India in September 1899, and took part in the defence of Ladysmith up to the time of his death.
Source: Donner | 19th (Queen Alexandra's Own Royal) Hussars |
| Orley | W R | | Able Seaman | QSA (1) CC. Ref: 188.973.
Source: QSA medal rolls | HMS Doris |
| Orlofse | C H | | | Source: QSA and KSA medal rolls | East Griqualand Mounted Volunteers |
| Orlofse | W H | 183 | Trooper | Source: QSA medal roll in WO100/286 | Uitenhage DMT |
| Orlopp | J F | 2 | Drummer | Frontier Wars. SAGS (1) 1877-8-9. KIA | Royal Warwickshire Regiment |
| Orlow | Theodore | | Bearer | Served 09 Dec 99 to 12 Mar 00.
Source: Nominal roll in WO127 | Natal Volunteer Ambulance Corps |
| Orlowski | J | | | Source: QSA and KSA medal rolls | New Zealand, 8th Contingent |
| Orman | D | | | 1st Battalion
Source: QSA and KSA medal rolls | King's Own Scottish Borderers |
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