| Regimental number | 3165 |
| Place of birth | Kerang Vic |
| Religion | Roman Catholic |
| Occupation | Grazier |
| Address | Bena, Victoria |
| Marital status | Single |
| Age at embarkation | 35 |
| Next of kin | Father, Hugh Hennessy, Balvornie, Bena, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 14th Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/31/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A17 Port Lincoln on |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 12th Field Artillery Brigade |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Listed on Coomoora State School No 836 Roll of Honor, Victoria. |
| Family/military connections | Brother: 3176 Lance Corporal David HENNESSY, 13th Light Horse Regiment, returned to Australia, 4 July 1919. |
| Other details |
War service: Egypt, Western Front Medals: 1914-15 Star, British War Medal, Victory Medal |