| Regimental number | 5515 |
| Religion | Roman Catholic |
| Occupation | Law clerk |
| Address | 19 Wilson Street, Moonee Ponds, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Hugh J O'Neill, 19 Wilson Street, Moonee Ponds, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | Infantry Brigade 6,Field Ambulance 6, Reinforcement 4 |
| AWM Embarkation Roll number | 26/49/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A16 Star Of Victoria on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Returned to Australia |
| Medals |
Croix de Guerre (Belgium) Source: 'Commonwealth Gazette' No. 91 Date: |