| Regimental number | 1756 |
| Religion | Roman Catholic |
| Occupation | Confectioner |
| Address | Stanley, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Bernard O'Neill, 32 Palmer Street, Fitzroy, Victoria |
| Previous military service | 62nd Infantry |
| Enlistment date | 8 January 1916 |
| Rank on enlistment | Private |
| Unit name | 46th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/63/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A14 Euripides on 4 April 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 46th Battalion |
| Fate | Returned to Australia 16 December 1917 |
| Family/military connections | Brother: 2942 Pte Lyttleton O'NEILL, 37th Bn, returned to Australia, 4 January 1919. |
