| Regimental number | 18418 |
| Place of birth | Sydney New South Wales |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, John Connellan, 84 Great Buckingham Street, Redfern, New South Wales |
| Enlistment date | 23 May 1917 |
| Rank on enlistment | Driver |
| Unit name | April 1917 Reinforcements |
| AWM Embarkation Roll number | 14/42/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A28 Miltiades on 2 August 1917 |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 2nd Field Company Engineers |
| Fate | Effective abroad (still overseas) |
| Family/military connections | Brother: 436 Company Quartermaster Sergeant James Aloysius CONNELLAN MM, 1st Bn, returned to Australia, 20 November 1918. |
