| Regimental number | 4063 |
| Place of birth | Parkes New South Wales |
| School | Holy Cross college, Ryde, New South Wales |
| Religion | Roman Catholic |
| Occupation | Carter |
| Address | Railway Parade, Canley Vale, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, C J Brennar, Railway Parade, Canley Vale, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 19th Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/36/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 19th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Flers, France |
| Age at death | 18.8 |
| Age at death from cemetery records | 18 |
| Place of burial | Warlencourt British Cemetery (Plot II, Row A, Grave No. 5), France |
| Panel number, Roll of Honour, Australian War Memorial | 88 |
| Miscellaneous information from cemetery records | Parents: Charles and Mary BRENNAN, 'Buena Vista', Cook Street, Mascot, New South Wales |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |