| Colgan | John William | 4025 | Trooper | Source: Nominal roll in WO127 | Kitchener's Horse |
| Colgan | John William | 580 | | Source: Attestation papers. See image on this site. | Railway Pioneer Regiment |
| Colgan | M | | | 1st Battalion
Source: Medal rolls | Royal Munster Fusiliers |
| Colgan | P | 1662 | Private | Frontier Wars. SAGS (1) 1879. Deserted | Royal Warwickshire Regiment |
| Colgan | P | | | 4th Battalion
Source: QSA and KSA medal rolls | Royal Dublin Fusiliers |
| Colgan | P | | | Received the Mediterranean Medal
5th Battalion
Source: Medal roll WO100 368 | Royal Munster Fusiliers |
| Colgan | P | | Honorary Lieutenant | MID LG: 10 September 1901, page: 5939. Source: Field Marshal Roberts. 4 September 1901. Re: General mentions
This page contains all the London Gazette pages for the Boer War | Norfolk Regiment |
| Colgan | P | | | 1st Battalion
Source: Medal rolls | Prince of Wales's Leinster Regiment (Royal Canadia |
| Colgan | Peter | 25338 | Private | Joined 23 Dec 00
Source: Nominal roll in WO127 | Cape Medical Staff Corps |
| Colgan | T | 65B/843 | Private | Frontier Wars. SAGS (1) 1879 | Connaught Rangers |
| Colgan | T | 4498 | Private | QSA (3).
Source: QSA medal rolls | 12th (The Prince of Wales's Royal) Lancers |
| Colgan | W | | | 1st Battalion
Source: Medal rolls | Royal Munster Fusiliers |
| Colgan | W J | 25629 | Trooper | Source: QSA Medal Rolls | 46th Company, 12th Btn, IY |
| Colgate | H | 2201 | Private | Frontier Wars. SAGS (1) 1879. Deserted | 1st (Royal) Dragoons |
| Colgrave | G | 5268 | Private | QSA (5). 'Colgraves' on E.C. Roll.
Source: QSA medal rolls | 12th (The Prince of Wales's Royal) Lancers |
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