| Regimental number | 819 |
| Place of birth | Borris-in-Ossory, Ireland |
| Place of birth | Queen's Co, Ireland |
| Religion | Roman Catholic |
| Occupation | Clerk |
| Address | 384 Darling Street, Balmain, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Mother, Mrs Ellen Brennan, Barrissinossory, Knockaroe, Ireland |
| Enlistment date | |
| Place of enlistment | Liverpool, New South Wales |
| Rank on enlistment | Private |
| Unit name | 17th Battalion, C Company |
| AWM Embarkation Roll number | 23/34/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A32 Themistocles on |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 53rd Battalion |
| Other details from Roll of Honour Circular | Enlisted 2 February 1915. Taken on strength, 17th Bn, 14 April 1915. Transferred to 53rd Bn, 9 October 1916. Appointed Lance Corporal, 4 August 1917. |
| Fate | Killed in Action |
| Place of death or wounding | France |
| Age at death | 27 |
| Place of burial | Adelaide Cemetery (Plot III, Row Q, Grave No. 9), Villers Bretonneux |
| Commemoration details | 156 |
| Other details |
War service: Egypt, Gallipoli, Western Front Embarked, Sydney, 12 May 1915; proceeded to join the Mediterranean Expeditionary Force, Gallipoli Peninsula, 16 August 1915; disembarked, Alexandria, Egypt, from Mudros, 9 January 1916 (general Gallipoli evacuation). Taken on strength of Australian Overseas Base, Ghezireh, 10 January 1916; proceeded to Zeitoun to join Unit, 31 March 1916; joined 5th Bn, Tel-el-Kebir, 1 April 1916; taken on strengths of No. 2 Divisional Details, 9 July 1916. Embarked, Alexandria, to join the British Expeditionary Force, 2 August 1916; taken on strength of 2nd Australian Divisional Base Depot, Etaples, France, 24 September 1916; taken on strength of 53rd Bn, 9 October 1916; to Lewis Gun School, 23 November 1916; rejoined unit from Lewis Gun School, 4 December 1916. Admitted to 15th Australian Field Ambulance (P.U.O), 7 March 1917; discharged to duty and rejoined unit, 14 March 1917; proceeded on leave to the United Kingdom, 8 May 1917; rejoined unit from leave, 8 May 1917; to Lewis Gun School, 24 June 1917; rejoined unit from Lewis Gun School, 30 June 1917; appointed Lance Corporal, 4 August 1917; to 5th Divisional Rifle Wing, 21 September 1917; rejoined unit, 2 October 1917; to Lewis Gun School, 22 January 1918; rejoined unit, 16 February 1918; proceeded on leave to the United Kingdom, 17 February 1918; rejoined unit from leave, 9 March 1918. Killed in action, France, 6 April 1918. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, BRENNAN Patrick Aloysius |