| Regimental number | 1836 |
| Place of birth | Geelong, Victoria |
| School | St Ambrose School, Brunswick, Victoria |
| Religion | Roman Catholic |
| Occupation | Driver |
| Address | 25 Ann Street, Windsor, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Height | 5' 6.5" |
| Weight | 132 lbs |
| Next of kin | Sister, Miss Bessie Ahern, 25 Ann Street, Windsor, Victoria |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Melbourne, Victoria |
| Rank on enlistment | Private |
| Unit name | 31st Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/48/3 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A55 Kyarra on |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 46th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Ypres, Belgium |
| Date of death | |
| Age at death | 23 |
| Age at death from cemetery records | 23 |
| Place of burial | Ridge Wood Military Cemetery (Plot III, Row I, Grave No. 5), Voormezeele, Belgium |
| Panel number, Roll of Honour, Australian War Memorial | 141 |
| Miscellaneous information from cemetery records | Parents: Michael and Catherine AHERN, 5 Rutherland Street, Coburg, Victoria. Native of Geelong, Victoria |
| Other details |
War service: Egypt, Western Front Allotted to and proceeded to join 46th Bn, Tel el Kebir, 6 March 1916. Embarked Alexandria to join the British Expeditionary Force, 2 June 1916; disembarked Marseilles, france, 8 June 1916. Appointed Acting Corporal, 10 September 1916. Killed in action, 1 October 1916. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, AHERN Thomas William |