Born: 1944 (age 79 years), Kildare, Ireland
Spouse: Clare Guinness, Countess of Iveagh (m. 2001)
Children: Arthur Guinness, Viscount Elveden and Rupert Guinness
Great-grandparents: Rupert Guinness, 2nd Earl of Iveagh, Gwendolen Guinness, Countess of Iveagh, Freda Vanden-Bempde-Johnstone, and more
Grandparents: Arthur Onslow Edward Guinness, Viscount Elveden and Lady Elizabeth Hare
Education: Royal Agricultural University