Grant married Jean Cameron Girvan 19 Feb 1938, Moncton, Westmorland, New Brunswick, Canada. Jean (daughter of Dr Robert Goldie Girvan and Maude Melvina Van Buskirk) was born 14 Aug 1915, Rexton, , New Brunswick, Canada; died 8 Mar 2001, Montreal, , Quebec, Canada. [Group Sheet]

1. Mark Franklin Longhurst was born 31 Aug 1941, Ottawa, Carleton, Ontario, Canada; died 6 Sep 1996, Yarrow, , British Columbia, Canada.
2. Katherine Ann Longhurst