| Regimental number | 48457 |
| Occupation | Farmer |
| Next of kin | Mother, Mrs Sarah Costar, Karaka via Papakura |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 26th Reinforcements (Second Draft), E Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 86 Maunganui on |
| Final rank | Private |
| Final unit | 1st Battalion, Auckland Infantry Regiment |
| Fate | Died of wounds |
| Age at death from cemetery records | 24 |
| Place of burial | Serre Road Cemetery No 2 (Plot XXIX, Row H, Grave No 16), Serre Les Puisieux, Somme, France |
| Miscellaneous information from cemetery records | Parents: Matoaka A and Sarah C Costar, Karaka, Papakura, Auckland |
| Family/military connections | Brother: 2/2600 Gnr Walter Richard COSTAR, New Zealand Field Artillery, died of wounds, 9 December 1917 |
| Sources | Nominal Roll Vol. 3: Roll 67, p. 5 |