Osman Hamdi was the son of Ibrahim Edhem Pasha, an Ottoman Grand Vizier (in office 1877–1878, replacing Midhat Pasha) who was originally a Greek boy from the Ottoman island of Sakız (Chios) orphaned at a very young age following the Chios massacre there. He was adopted by Kaptan-ı Derya (Grand Admiral) Hüsrev Pasha and eventually rose to the ranks of the ruling class of the Ottoman Empire.