He was born in Stutterheim, Cape Colony on 7 November 1869, son of Colonel W J Warren, CMG, a Kaffir war veteran. Enlisted, Troop Sergeant Major, FMR, 28 November 1888. Discharged 30 June 1890. Trooper (39), Pioneer Corps and served in the Mashonaland Expedition of 1890. Farmed at Kei Road. Enlisted at Kei Road, 9 November 1899, as 28 Trooper in 1st BrH and posted to A Troop. Trade: Farmer. Lieutenant 26 November 1899. Captain 28 January 1900. Resigned 28 April 1900. Appointed BoH (Captain) 28 April 1900. Resigned 30 November 1900. He then became a Captain in A Squadron Stutterheim District Mounted Troops and later a Captain in the Union Defence Force, Reserve of Officers. He died 24 May 1941 in Stutterheim.