| Regimental number | 27351 |
| Occupation | Labourer |
| Next of kin | Brother, Cornelius O'Leary, Wairou Valley Blenheim |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 17th Reinforcements, J Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 64 Devon on |
| Sources | Nominal Roll Vol. 2: Roll 41, p. 20 |