He was s of Wing Cdr John Richard Hensman GAYNER DFC RAF 1918-87 and Pamela 1913-75 only d of Brig-Gen Stuart Peter ROLT CB 1862-1933 and Evelyn Roylance COURT b 5 Oct 1883 & d 1941 scion of that gentry family (now ROLT) of Middlewich and d of Mary Carlaw 1858-1933 (Mrs William Court) d of Sir Andrew Barclay WALKER 1st Bt 1824-93 (now WALKER-OKEOVER, f of 1st & only Baron WAVERTREE 1856-1933). He m 1972 reg Q4 Hants Virginia (Ginna) Eilun Hamilton b Dec 1948 d of Cdr David Aubrey Hamilton BORTHWICK RN 1921-2010 by his 27 Oct 1943 m (Beaulieu Abbey) to Pamela (Bunny) 1921-2019 d of Maj Guy Thomas William WALKER c1874-1940 by his 1912 m reg Q4 Hants to Dorothy Lilian MITCHELL 1884-1961 of Bignalls, Beaulieu, and had three sons.
1. James Richard Heydon b 1976 reg Q2 London
2. Oliver Stuart Heydon b 1977 reg Q3 London
3. Henry (Harry) Charles Heydon b 23 Feb 1983 (Times 25 Feb): m 2018 Jessica Rose b 1988 d of Jonathan DUNN and Rachel Anne b 1957 d of Simon Rupert GILBEY 1929-2017 (gt gs of Sir Walter GILBEY 1st Bt 1831-1914) and his 1st w Chloë Rio 1931-66 d of Col Christopher Rawlinson CADGE OBE 1890-1982 (s of Caroline Emma BEVAN 1855-1932 (Mrs Edward Cadge) scion of that gentry family f/o Trent Park) by his 1930 m reg Q4 Kent to Elizabeth Rio PRATTEN 1905-81, and had issue
3.1 Beatrice Rio b 2019 reg Q2 Hackney