John Jacques William Aitchison was born to Harold Aitchison and Phyllis Jacques, in Durban, Natal (now kwaZulu-Natal) on 2 June 1944. He was brought up by his grandparents as his mother passed away a few days after he was born.
Aitchison grew up in Durban where he attended the Durban Prepartory High School for his primary education and Durban High School for Secondary education. He then went to Pietermaritzburg to study at the University of Natal and remained in Pietermaritzburg until relocating to Durban in 2011.