| Regimental number | 2463 |
| Place of birth | Wollongong, New South Wales |
| School | Convent School, New South Wales |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Orange, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Uncle, D Reddan, Orange, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 2nd Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/19/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Battalion |
| Fate | Died of wounds |
| Miscellaneous details (Nominal Roll) | *Spelt John William Reddan on NR |
| Place of death or wounding | Pozieres, Somme Sector, France |
| Age at death | 22 |
| Age at death from cemetery records | 22 |
| Place of burial | Etaples Military Cemetery (Plot IX, Row C, Grave No. 5A), France |
| Panel number, Roll of Honour, Australian War Memorial | 34 |
| Miscellaneous information from cemetery records | Parents: John and Margaret REDDAN. Native of Wollongong, New South Wales |
| Family/military connections | Uncle: George Frederick Reed, died March 1919; Cousin: Robert Parkuis, returned. |