| Regimental number | 2650 |
| Place of birth | Gympie Queensland |
| Religion | Roman Catholic |
| Occupation | Solicitors apprentice |
| Address | Riversdale, South Side, Gympie, Queensland |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, James Macdonnell, Riversdale, South Side, Gympie, Queensland |
| Enlistment date | 29 April 1915 |
| Date of enlistment from Nominal Roll | 29 April 1916 |
| Rank on enlistment | Private |
| Unit name | 5th Light Horse Regiment, C Company |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A49 Seang Choon on 4 May 1916 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | Light Horse Details |
| Fate | Returned to Australia 17 July 1919 |
| Family/military connections | Brothers: [1627] 2nd Lt Leonard Francis MacDONNELL, 26th Bn, killed in action, 4 October 1917; 94 Pte Neil Thomas Joseph Byrnes MacDONNELL, 3rd Machine Gun Bn, died of wounds, 17 March 1917. |
