| O'Neill | T | | | 2nd Battalion
Source: QSA and KSA medal rolls | Royal Irish Rifles |
| O'Neill | T | 6895 | Private | 6th Battalion
Source: QSA roll | Lancashire Fusiliers |
| O'Neill | T | | | 2nd Battalion
Source: QSA and KSA medal rolls | East Yorkshire Regiment |
| O'Neill | T | | | 2nd Battalion
Source: QSA and KSA medal rolls | Cheshire Regiment |
| O'Neill | T | 6039 | Lance Corporal | 2nd Battalion
Demise: Killed in action 27 Feb 1900
Place: Tugela Heights. Pieter's Hill
Source: In Memoriam by S Watt | (Princess Victoria's) Royal Irish Fusiliers |
| O'Neill | T | 464 | Private | Demise: Killed in action 24 Jan 1900
Place: Spioenkop
Source: In Memoriam by S Watt | Imperial Light Infantry |
| O'Neill | T | 1249 | Sergeant | Frontier Wars. SAGS (1) 1879 | South Staffordshire Regiment |
| O'Neill | T | | | 1st Battalion
Source: QSA and KSA medal rolls | Loyal North Lancashire Regiment |
| O'Neill | T | 6039 | Lance Corporal | Pieter's Hill 27 Feb 00 (killed in action)
Source: DCM recipients | (Princess Victoria's) Royal Irish Fusiliers |
| O'Neill | T | | | Source: QSA and KSA medal rolls | 43rd Battery, RFA |
| O'Neill | T | | | 1st Battalion
Source: QSA and KSA medal rolls | East Lancashire Regiment |
| O'Neill | T | | | 2nd Battalion
Source: QSA and KSA medal rolls | (King's Own) Yorkshire Light Infantry |
| O'Neill | T | | | 2nd Battalion
Source: Medal rolls | Cheshire Regiment |
| O'Neill | T | 6039 | L Corporal | 1st Btn. Killed at Natal. 27 Feb 1900.
Source: Natal Field Force Casualty Roll, page 175 line 56 | (Princess Victoria's) Royal Irish Fusiliers |
| O'Neill | T | 6039 | Lance Corporal | 2nd Battalion
Source: QSA roll | (Princess Victoria's) Royal Irish Fusiliers |
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