| Regimental number | 1208 |
| Place of birth | Brisbane, Queensland |
| School | Queensland Agricultural College, Gatton, Queensland |
| Religion | Roman Catholic |
| Occupation | Stockman |
| Address | George Street, Bundaberg, Queensland |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs O'Neill, George Street, Bundaberg, Queensland |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 11th Light Horse Regiment, 6th Reinforcement |
| AWM Embarkation Roll number | 10/16/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A47 Mashobra on |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 11th Light Horse Regiment |
| Fate | Killed in Action |
| Place of death or wounding | Telelsheria, Palestine |
| Age at death | 28 |
| Age at death from cemetery records | 28 |
| Place of burial | Gaza War Cemetery (Plot XII, Row E, Grave No. 2), Palestine |
| Panel number, Roll of Honour, Australian War Memorial | 8 |
| Miscellaneous information from cemetery records | Parents: Thomas and Mary O'NEILL, George Street, Bundaberg, Queensland |
| Family/military connections | Brother: Peter Aloysius O'NEILL, Pte 6544, 15th Bn, died of wounds 20 August 1917. Brother: John Alphonsus O'NEILL, Pte 3649, 42nd Bn, returned to Australia 2 Janaury 1919 |