[1] He was the advisor of King Zog I of Albania and succeeded as head of the Ottoman dynasty on 9 December 1983, following the death of Şehzade Ali Vâsib.

[4] His father was Şehzade Mehmed Abdülkadir, son of Abdul Hamid II and Bidar Kadın, and his mother was Mihriban Hanım,[4] and ethnic Abkhazian.

[7] At the exile of the imperial family in March 1924, Mehmed Orhan settled in Budapest, Hungary.

[6][2] Mehmed Orhan worked as shipbuilder and picture seller at an art gallery in São Paulo, Brazil, taxi driver in Beirut, Lebanon, and Damascus, Syria, a cemetery attendant in the United States of America and an Advisor of King Zog I of Albania.

[8][2] From 1983, following the death of Ali Vâsib, he served as the head of the imperial house from his home in Nice, France.

[11][12] Her eldest sister, Berkemal Hanım, was married to Mehmed Abdulaziz, 40th head of the Ottoman dynasty from 1973 to 1977, and was the mother of the couple's only daughter, Hürrem Sultan.