He was s of Peter Victor Ferdinand CAZALET 1907-73 sometime head of that gentry family of Fairlawne and his 2nd w Zara Sophie Kathleen Mary 1917-2004 d of Sir Harry Stapleton MAINWARING 5th Bt 1878-1934 and Generis Alma Windham 1889-1946 d of Sir Richard Henry WILLIAMS-BULKELEY 12th Bt 1862-1942 and Lady Magdalen YORKE 1865-1940 (d of 5th Earl of HARDWICKE 1836-97, gd of 1st Earl COWLEY 1804-84 etc etc). He m 1976 Mary Isabel (Isabee) Dorothy b 1955 d of Maj Hon George William ffolkes DAWNAY 1909-90 (s of 9th Viscount DOWNE 1872-1931) and Rosemary Helen GROSVENOR 1918-69 (gd of 1st Duke of WESTMINSTER 1825-99, and of 5th Earl of KENMARE 1860-1941 etc), and had a son and two daus as above.