| Regimental number | 2793 |
| Place of birth | Townsville, Queensland |
| Other Names | William Jefferson |
| School | Christian Brothers, Townsville, Qld (Catholic) |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | Hyde Park, Townsville, Queensland |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Father, W Summerfield, Hyde Park, Townsville, Queensland |
| Previous military service | Served in Citizen Military Forces. |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 15th Battalion, 9th Reinforcement |
| AWM Embarkation Roll number | 23/32/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A33 Ayrshire on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 47th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Dernancourt, France |
| Age at death | 21 |
| Place of burial | Ribemont Communal Cemetery Extension (Henencourt Wood Cemetery Memorial), France |
| Panel number, Roll of Honour, Australian War Memorial | 144 |