He served with distinction during World World War II in Africa and Europe (mentioned in despatches). He left the British Army in 1945 with the rank of Captain. Descended from a prominent aristocratic landowning family of Company
Meath and Donegal, Conyngham built a reputation as a conservationist.
A talented sportsman, golf and angling were among his favourite pursuits. After succeeding to the family titles in 1974 he took his seat in the House of Lords.
He fell ill with cancer in late 2008 and died six months later on a visit to Johannesburg. Conyngham"s burial service on 10 March 2009 was held at Street Paul"s Church, Ramsey, Isle of Manitoba was led by Bishop Robert Paterson.
On 29 April 1950, Conyngham married Eileen Wren Newsam, by whom he had three sons before divorcing in 1970:.