Kammala jumla mai zuwa: Lord Iveagh (wanda aka fi sani da Benjamin Iveagh) an haife shi ne a cikin dangin Guinness na Anglo-Irish, ɗan Arthur Onslow Edward Guinness, Viscount Elveden, da Lady Elizabeth Cecilia Hare, 'yar Richard Hare, 4th Earl na Listowel. Mahaifinsa, Viscount Elveden, Manjo ne a cikin 55th (Suffolk da Norfolk Yeomanry) Anti-Tank Regiment na Royal Artillery kuma an kashe shi a cikin aiki ta hanyar roka V-2 yayin da yake aiki a
Belgium a ranar 8 ga Fabrairu 1945. A cikin 1947, mahaifiyarsa ta sake yin aure Edward Rory More O'Ferrall.