Born in London, 8 January 1866, the fourth child and third son of Constantine A Ionides, of the Stock Exchange, and Agatha Fenerly, his wife. He thus belonged to the family of Greek merchants whose art bequests are preserved at the Victoria and Albert Museum. He was educated at Winchester, and at University College Hospital where he acted as house surgeon. Settling at Brighton he was elected assistant surgeon to the Royal Alexandra Hospital for Sick Children, and on 18 September 1901 became assistant surgeon to the Royal Sussex County Hospital, becoming surgeon on 3 December 1919 and consulting surgeon upon his retirement on 15 July 1925. During this time he practised surgery, gynaecology, and obstetrics. When the Territorial Force was established he received a commission as major, RAMC (T), on 27 April 1908 and was attached à la suite to the 2nd Eastern General Hospital, Brighton. Called up in 1914 he served in France at various casualty clearing stations. He returned to practice on demobilization and was president of the Brighton and Sussex Medico-chirurgical Society in 1919. In 1896 he married Kitty, daughter of John Cavafy (1838-1901), MD, FRCP, physician to St George's Hospital. She survived him, with a son and a daughter. He died at Hove on 2 December 1936.