| Place of birth | Palmerston, New Zealand |
| Religion | Presbyterian |
| Occupation | Architect |
| Address | Arnott House, Wynyard Square, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 27 |
| Next of kin | Father, William Henry Wren, 8 Montreal Street, Sydenham, Christchurch, New Zealand |
| Enlistment date | 5 January 1916 |
| Date of enlistment from Nominal Roll | 1 December 1915 |
| Place of enlistment | Liverpool, New South Wales |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | 55th Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/72/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A29 Suevic on 11 November 1916 |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 55th Battalion |
| Fate | Returned to Australia 23 September 1919 |
