| First Name: | M. |
| Last Name: | Costello |
| Rank: | Sergeant |
| Regiment: | 4th Connaught Rangers |
| Military Number: | 4442 |
| Place of Birth: | Ballinasloe |
| Place of Death: | France-Flanders |
| Date of Death: | 06-Feb-16 |
| Age: | |
| Additional Information: | Died of Wounds: 6 February 1916. Supplementary Notes: Born: Ballinasloe, Galway. Buried: Alternative Commemoration Creagh new cemetery -Ballinasloe -Ireland (screen wall). Remembered: Grangegorman Memorial Dublin -Ireland.
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Connaught Rangers.
Grangegorman military cemetery-Dublin-Ireland (RC. 540)