| Regimental number | 4986 |
| Place of birth | Edenhope, Victoria |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Edenhope, Victoria |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Sister, Miss Mary Brennan, c/o Mooney's Hotel, Ararat, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 24th Battalion, 13th Reinforcement |
| AWM Embarkation Roll number | 23/41/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A32 Themistocles on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 24th Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 632 Corporal John BRENNAN, 24th Bn, returned to Australia, 26 September 1917; 5119 Pte Patrick BRENNAN, 24th Bn, killed in action, 3 May 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |