He was s of (William) Donald Hamilton MCCULLOUGH 1901-78 by his c1936 m reg Q1 Westmorland to Hannah Kynaston (Nan) 1909-2001 d of Capt Hector Lloyd WATTS-JONES RN 1872-1933 by his 3 June 1903 m (Lund) to Mary Kynaston 1870-1951 d of Edmund Peel POTTER 1847-1933 and Ellen Anne CROSS 1849-1915. He m 1966 reg Q2 IoW Philippa (Pippa) Anne Beaufort b 1942 reg Q4 Somerset d of Philip Rainier Beaufort GRIMALDI (15th Marquis Grimaldi) 1912-83 by his 1940 m reg Q2 IoW to Phyllis Anne 1915-2000 d of Garnet Wolsley TWIGG 1882-1973 (s of James Henderson TWIGG 1843-1915) scion of that Irish gentry family f/o Thorndale by his 16th May 1912 m (St Peter’s, Cranley Gdns, London) to Phyllis Margaret 1887-1957 d of William Glendower MACKENZIE c1849-1913 (stockbroker) by his 11 March 1886 m (Lahore, India) to Sarah PULLEN d 1910. His dau Antonia Hannah Beaufort m 1992 Hugo John b 1964 yr s of Sir Simon Francis Bethell CODRINGTON 3rd Bt 1923-2005 and his 2nd (of four) w (her 1st h) Pamela Joy Halliday b 1937 reg Q3 Kent d of Maj George Walter Bentley WISE MBE 1912-2007 by his 1931 m to Agnes HALLIDAY, and had two sons.