| Regimental number | 6218 |
| Place of birth | Sydney New South Wales |
| School | Convent (Catholic) School, Bankstown, New South Wales |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Liverpool Road, Bankstown, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, T Brennan, Liverpool Road, Bankstown, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 1st Battalion, 20th Reinforcement |
| AWM Embarkation Roll number | 23/18/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Battalion |
| Fate | Died of wounds |
| Miscellaneous details (Nominal Roll) | *Given name Leo Victor |
| Place of death or wounding | France |
| Date of death | |
| Age at death | 21 |
| Age at death from cemetery records | 21 |
| Place of burial | Abbeville Communal Cemetery Extension (Plot III, Row D, Grave No. 17), France |
| Panel number, Roll of Honour, Australian War Memorial | 28 |
| Miscellaneous information from cemetery records | Parents: Thomas and Luch BRENNAN, Liverpool Street, Bankstown, New South Wales |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |