He married Veronica Nell Fraser-Phipps (1920–2005), a Roman Catholic, in 1946. She was the daughter of the 16th Lord Lovat and widow of naval hero Lt. Alan Phipps, who was killed ashore at Leros in 1943. Sir Fitzroy and Lady Maclean had two sons: Charles Edward (born 1946) and Alexander James Simon Aeneas ("Jamie"; born 1949), who were brought up in their mother's faith. Charles is an author, well known for dark thrillers, including the cult classic "The Watcher". Jamie became an art dealer and founded the "Erotic Review".