| Brennan | J | 1015 | Trooper | Served 01 Jun 00 to 07 Aug 00 Discharged O R
Source: Nominal roll in WO127 | Bethune's Mounted Infantry |
| Brennan | J | | | 1st Battalion
Source: QSA and KSA medal rolls | East Lancashire Regiment |
| Brennan | J | | Private | Natal 1906 (1)
Source: Recipients of the Natal 1906 Medal | Natal Medical Corps |
| Brennan | J | | | 2nd Battalion
Source: QSA and KSA medal rolls | (Prince of Wales's Own) West Yorkshire Regiment |
| Brennan | J | 3825 | Private | QSA (3) DoL OFS Tr
Provisional list of recipients
Source: Ladysmith Siege Account and Medal Roll | 5th (Princess Charlotte of Wales's) Dragoon Guards |
| Brennan | J | | | 1st Battalion
Source: Medal rolls | Prince of Wales's Leinster Regiment (Royal Canadia |
| Brennan | J | | | 1st Battalion
Source: QSA and KSA medal rolls | (King's) Liverpool Regiment |
| Brennan | J | | | 3rd Battalion
Source: QSA and KSA medal rolls | (Queen's) Royal West Surrey Regiment |
| Brennan | J | | | 3rd Battalion
Source: Medal rolls | (Princess Louise's) Sutherland and Argyll Highland |
| Brennan | J | | | Source: QSA and KSA medal rolls | Coldstream Guards |
| Brennan | J | | | 1st Battalion
Source: QSA and KSA medal rolls | Northumberland Fusiliers |
| Brennan | J | | | 3rd Battalion
Source: QSA and KSA medal rolls | Durham Light Infantry |
| Brennan | J | | | 2nd Battalion
Source: Medal rolls | Cheshire Regiment |
| Brennan | J | | | 3rd Battalion
Source: Medal rolls | Cheshire Regiment |
| Brennan | J | | | Source: QSA and KSA medal rolls | 86th Battery, RFA |
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