He was s of Col Sir John Francis PRIDEAUX OBE TD 1911-83 (whom he succ. as) head of that gentry family of Elderslie and Joan Terrell 1911-2008 d of Capt Gordon Hargreaves BROWN MC 1880-ka1914 (s of Sir Alexander Hargreaves BROWN 1st Bt 1844-1922) and Editha Ivy PIGOTT 1888-1964 (6xgt gd of 1st Baron WARD c1614-1670 and The Baroness DUDLEY 1611-70, etc). He m 1959 Celia b 1936 d of Sir Peter Averell DANIELL TD 1909-2002 scion of that gentry family f/o Daresbury and Leonie Mayne HARRISON 1912-97, and had two sons and a dau as above. His elder son succeeds as head of the family.
1 DAVID JOHN Prideaux b 5 Oct 1962, m 1989 reg Q2 Suffolk, Sally Margaret 1963-2013 d of Ian Scott LIDDELL b 1931 of Sheering, Essex and Jean Margaret MORRIS b c1937, and had issue
1.1 Thomas Felix J b 1992 reg Q3 London
1.2 William Christopher b 1994 reg Q2 London
2. Charles Christopher b 1966, m 1998 reg Q2 Wilts Barbara H V d of Andrei HOOGEWEEGEN of Sandridge Park, Wilts, and has issue
2.1 Benedict Andrew C. b 2003 reg Q2 London
2.1 Lara Annelike C. b 2001 reg Q2 London
1. Lavinia Marion b 1961, m 1st 1981 Barry J. CAMERON. She m 2nd 1992 Allan Gilfillan MAINDS and had two daus
1.1 Harriet
1.2 Polly b 1994