| Regimental number | 2237 |
| Place of birth | Callington, South Australia |
| Religion | Roman Catholic |
| Occupation | Miner |
| Address | Melbourne GPO, Melbourne, Victoria |
| Marital status | Single |
| Age at embarkation | 34 |
| Next of kin | Father, Patrick O'Neill, Callington, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 59th Battalion, 4th Reinforcement |
| AWM Embarkation Roll number | 23/76/3 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 59th Battalion |
| Fate | Killed in Action |
| Age at death from cemetery records | 36 |
| Place of burial | Heath Cemetery (Plot I, Row A, Grave No. 20), Harbonnieres, France |
| Panel number, Roll of Honour, Australian War Memorial | 168 |
| Miscellaneous information from cemetery records | Parents: Patrick and Elizabeth O'NEILL, Murray Bridge, South Australia |
| Family/military connections | Brother: 2220 Pte William Peter O'NEILL MM & Bar, 48th Bn, died of wounds, 8 April 1918. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
