| Regimental number | 3764 |
| Place of birth | Kyogle |
| Place of birth | Tiaro, Queensland |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Kyogle, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Height | 5' 7" |
| Weight | 126 lbs |
| Next of kin | Father, John Kerr, Wyangerie via Kyogle, New South Wales |
| Enlistment date | |
| Place of enlistment | Lismore, New South Wales |
| Rank on enlistment | Private |
| Unit name | 53rd Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/70/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A28 Miltiades on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 9th Battalion |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *second given name two spellings Ostend and Austin |
| Age at death from cemetery records | 19 |
| Place of burial | Heath Cemetery (Plot IV, Row G, Grave no. 12), Harbonnieres, France |
| Panel number, Roll of Honour, Australian War Memorial | 56 |
| Miscellaneous information from cemetery records | Parents: John and Harriett Mary KERR, Wiangaree, New South Wales |
| Family/military connections | Brothers: 1155 Pte James KERR, 9th Bn, returned to Australia, 20 May 1919; 671 Lance Sergeant Robert William KERR MM, 9th Bn, returned to Australia, 3 December 1918; Cousins: 1753 Pte Robert Clive KERR, 1st Bn, returned to Australia, 13 March 1918; 2053 Pte Clarence Michael KERR, 4th Light Horse Regiment, returned to Australia, 15 June 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, KERR Cyril Ostend |