He was s of Maurice MARTINEAU of Walsham le Willows, Suffolk. He m 1981 Diana b 1941 d of Maj Robert Henry CALVERT 1912-87 scion of that gentry family of Ockley Court (and gs of Sir Hugh Arthur Henry CHOLMELEY 3rd Bt 1839-1904, gt gs of Sir Charles Robert ROWLEY 4th Bt 1800-88, 2xgt gs of 2nd Baron HUNTINGFIELD 1778-1844, etc) and Monica 1916-2007 d of Edward Gurney BUXTON 1865-1929 (gs of Sir Edward North BUXTON 2nd Bt 1812-58) and Laura 1875-1957 d of John GURNEY 1845-87 scion of that gentry family of Walsingham Abbey and as her 1st h Dame Isabel Charlotte DBE DGStJ 1854-1932 (Lady Talbot de Malahide) d of Robert BLAKE-HUMFREY 1795-1886 sometime head of that gentry family (now HUMFREY-MASON) f/o Necton etc and Charlotte 1809-94 d of Lt-Col John HARVEY 1755-1842 (gf of Sir Robert John HARVEY 1st Bt 1817-70 who was gt gf of 1st Baron HARVEY OF TASBURGH & 4th Bt 1893-1968) and Frances 1765-1809 d of Sir Roger KERRISON 1740-1808 sometime head of that gentry family of Burgh Hall, and had a son and two daus as above