Mehmed VI ( Meḥmed-i sâdis, Vahideddin, or ), who is also known as Şahbaba (meaning "Emperor-father") among his relatives, (14 January 1861 – 16 May 1926) was the 36th and last Sultan of the Ottoman Empire, reigning from 1918 to 1922. The brother of Mehmed V, he succeeded to the throne as the eldest male member of the House of Osman after the 1916 suicide of Abdülaziz's son Yusuf Izzettin Efendi, the heir to the throne. He was girded with the Sword of Osman on 4 June 1918, as the thirty-sixth padishah. His father was Sultan Abdülmecid I and mother was Gülüstü (1831 – May 1861), an ethnic Abkhazian, daughter of Prince Tahir Bey Çaçba and his wife Afişe Lakerba, originally named Fatma Çaçba. Mehmed was removed from the throne when the Ottoman sultanate was abolished in 1922.