Clifford married Minna à Beckett, daughter of Gilbert Arthur à Beckett, on 15 April 1896, and they had one son and two daughters: Hugh Gilbert Francis Clifford, Mary Agnes Philippa and Monica Elizabeth Mary.
On 24 September 1910 Hugh Clifford remarried, to Elizabeth Lydia Rosabelle Bonham,[REF] CBE,[REF] daughter of Edward Bonham of Bramling, Kent, a British consul.