Trevor was the elder of two children of Norman Bernard de Kuyper Waymouth and Hilda Jessie (nee MacFarlane).

Born in Argentina to a New Zealand father and an English mother, Trevor held passports from three countries. He was educated in Argentina and England and joined the RAF in 1937.   During WW2 he served in the Middle East and India (flying instructor) and over Europe from England.   He became a Wing Commander.   After the war Trevor became Managing Director for British South American Airways from 1945 to 1952.   He re-joined the RAF until 1962.   Speaking many languages, Trevor then took a position with a steel company, Handy Angle, to promote its products in Europe, Africa and the Americas.   He retired in 1972.

Trevor married twice, firstly to Kathleen Sybil Hancock, three children and secondly to Wilhelmine Emilie Dorothee Zirkel, two daughters.