John Alexandra Calder
- Born 29 December 1886, Wreys Bush, Southland, New Zealand
- Died details of death unknown
- Last rank Trooper
- Service number 58137
- Served In 34th Reinforcements, Mounted Rifles Brigade, New Zealand Expeditionary Force
- Next of Kin Mr John Calder (father), Dipton, Southland
- Pre-war occupation Farmer
- ReligionPresbyterian
- Enlisted18 August 1917
- Embarkationaboard HMNZT 98 Tofua, departed 13 November 1917, Wellington, disembarked Suez, Egypt, 21 December 1917.
- Theatres of operationEgyptian E.F. 1917-1919
- Periods of service115 days in New Zealand and one year 308 days overseas in Egypt. Total service of two years and 58 days.
- Returned to New Zealandaboard Ellenga, 16 September 1919
- Discharged14 October 1919, on termination of period of engagement
- AwardedBritish War Medal and Victory Medal
Served in WWI and WWII.