He was s of Maj Thomas Douglas PILKINGTON 1912-2000 (who he succ. as) head of that gentry family of Reay and his 1st w Vivien Mary 1913-95 d of Walter Bernard BAKER 1875-1949 of Tunworth, Hants and Milicent EMERSON 1891-1979. He m 1962 Penelope b 1940 d of Lt-Col Edward BUTLER-HENDERSON 1916-2002 (gs of 1st Baron FARINGDON 1850-1934, as well gs of 5th Baron CLARINA 1837-1922) and Elizabeth Marjorie Dacres 1920-88 d of Henry George Dacres DIXON 1887-1947 and Marjorie Edith PELHAM 1897-1995 (gd of 3rd Earl of YARBOROUGH 1835-75), and had a son (RORY IAN DOUGLAS b 1968 who is married with a dau) and two daus (Camilla Douglas (Hon Mrs George Ponsonby) b 1966 who m 1st a scion of the RICHMOND & GORDON dukes and had issue, and m 2nd a gs of the 5th Baron DE MAULEY 1878-1962; and Sarah Douglas b 1973 who is m with no known issue).