In 1945 he was elected a Fellow of the
Royal Society of Edinburgh. His proposers were
Francis Balfour-Browne,
James Ritchie, Sir
D'Arcy Wentworth Thompson, and
Alexander Charles Stephen. He served as Vice President of the Society from 1953 to 1956 and 1969 to 1970 and as President from 1970 to 1973. Yonge was elected a
Fellow of the Royal Society in 1946 and won its
Darwin Medal in 1968. He was knighted by Queen
Elizabeth II in 1967. In 1927 Yonge married Dr Martha "Mattie" Lennox, a fellow student he had met during their days at
Edinburgh, where she was reading medicine. They had two children, Elspeth (born 1931) and Robin (born 1934). Mattie Lennox Yonge died in 1945. In 1955, Yonge became father-in-law of the physicist
Bruno Touschek due to Elspeth's marriage. Sir Maurice Yonge died in 1986. He was survived by his second wife, Phyllis Fraser, whom he married in 1954. They had a son, Christopher (born 1955). == Legacy ==