He was s of James Seymour SPENCER 1900-67 and Winifred Anna HAMILTON 1905-86 (scion of the BELHAVEN & STENTON lords and ABERCORN dukes, and 2xgt gd of Sir Walter FARQUHAR 1st Bt 1738-1819 and 20xgt gd of 3rd Earl of LEICESTER d 1190 etc etc). He m 1965 (Nancy) Loveday 1930-2021 d of Edmund George CORYTON 1889-1981 scion of that gentry family of Pentillie Castle and Nesta Muriel 1892-1980 d of Charles Robert Sydenham CAREW 1853-1939 (gt gs of Sir Thomas CAREW 6th Bt 1755-1805) and Muriel Mary 1867-1939 d of Sir John HEATHCOAT-AMORY 1st Bt 1829-1914, and had two sons.