| Other Names | Isadore MacWilliam |
| Religion | Roman Catholic |
| Occupation | Medical practitioner |
| Address | c/o Bruck and Thomson, 15 Castlereagh Street, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 40 |
| Next of kin | Uncle, H Holland, 10 Outtram Road, E Croydon, England |
| Enlistment date | 8 April 1915 |
| Rank on enlistment | Captain |
| Unit name | Medical Officers |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A63 Karoola on 16 June 1915 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A6 Clan MacQuorquodale on 6 February 1915 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A12 Saldanha on 5 February 1915 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A48 Seang Bee on 11 February 1915 |
| Rank from Nominal Roll | Major |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Returned to Australia 1 November 1917 |
