| Barker | A | | | 5th Battalion
Source: QSA and KSA medal rolls | Manchester Regiment |
| Barker | A | 814 | Private | Died of disease. Bloemfontein, 28 June 1900
1st Battalion.
Source: South African Field Force Casualty Roll | Suffolk Regiment |
| Barker | A | | | 2nd Battalion
Source: QSA and KSA medal rolls | Lincolnshire Regiment |
| Barker | A | 8088 | Private | Died of disease. Harrismith, 2 February 1901
2nd Battalion.
Source: South African Field Force Casualty Roll | Scots Guards |
| Barker | A | 3309 | Private | Killed in action. Colesberg, 1 January 1900
Source: South African Field Force Casualty Roll | 10th (The Prince of Wales's Own Royal) Hussars |
| Barker | A | 947 | Trooper | Slightly wounded. Senekal, 26 June 1900
2nd Battalion.
Source: South African Field Force Casualty Roll | Brabant's Horse |
| Barker | A | | | 4th Battalion
Source: QSA and KSA medal rolls | Cheshire Regiment |
| Barker | A | | | 2nd Battalion
Source: QSA and KSA medal rolls | Cheshire Regiment |
| Barker | A | | | 2nd Battalion
Source: QSA and KSA medal rolls | East Surrey Regiment |
| Barker | A | 3906 | Corporal | Source: DCM recipients | (King's Own) Yorkshire Light Infantry |
| Barker | A | 814 | Private | 1st Battalion
Demise: Died of disease 28 Jun 1900
Place: Bloemfontein
Source: In Memoriam by S Watt | Suffolk Regiment |
| Barker | A | 8088 | Private | 2nd Battalion
Demise: Died of disease 02 Feb 1901
Place: Harrismith
Source: In Memoriam by S Watt | Scots Guards |
| Barker | A | 2350 | L Corporal | 2nd Btn. Died of dysentery at Estcourt. 30 Apr 1900.
Source: Natal Field Force Casualty Roll, page 119 line 18 | East Surrey Regiment |
| Barker | A | | | Source: QSA and KSA medal rolls | Coldstream Guards |
| Barker | A | | | 2nd Battalion
Source: QSA and KSA medal rolls | East Yorkshire Regiment |
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