| Barker | J T | | Master | Transport Medal, clasp: China. Ship: Clavering (Haslehurst).
Source: Transport Medal roll | Transport ships |
| Barker | J T P | | | Source: WO100/286 | Vryburg TG |
| Barker | J W | | | 1st Battalion
Source: QSA and KSA medal rolls | South Staffordshire Regiment |
| Barker | James | 1913 | Trooper | 2nd Battalion
Source: Nominal roll in WO127 | Imperial Light Horse |
| Barker | James Brack | | | Source: WO100/281 | Indwe TG |
| Barker | James Campbell | | Colonel | CRE 9th Div. QSA sent to Naval and Military Club, 94 Piccadilly.
QSA (4) CC Paard OFS Drief. KSA
TNA ref 299/36; 316/10 | Royal Engineers, Staff |
| Barker | James Frederick | 46 | Private | Source: OZ-Boer database | Queensland, 1st Mounted Infantry Contingent |
| Barker | James George | | | Source: QSA and KSA medal rolls | 65th Battery, RFA |
| Barker | John | | Private | Source: OZ-Boer database | Victoria, 5th Mounted Rifles Contingent |
| Barker | John | | | 1st Battalion
Source: QSA and KSA medal rolls | Scots Guards |
| Barker | John | 42527 | Trooper | No known Company. Served in 38th Btn IY
Source: QSA Medal Rolls | Imperial Yeomanry |
| Barker | John | | | Source: QSA and KSA medal rolls | 17th Battery, RFA |
| Barker | John | 25554 | Trooper | Source: QSA Medal Rolls | 23rd Company, 8th Btn, IY |
| Barker | John | 152 | Private | Source: OZ-Boer database | Queensland, 5th Imperial Bushmen Contingent |
| Barker | John | 4136 | Private | BSACM Rhodesia 1896 (0).
Source: BSACM rolls | York and Lancaster Regiment |
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