Yûsuf Sinan, known as Ümmî Sinan, was a Sufi sheikh and tekke poet of the Ahmediyye branch of the Halvetiyye order, born in Elmalı, Antalya. He received his spiritual licence from Eroğlu Nûrî and guided disciples at the lodge bearing his name in Elmalı. His most famous successor was the great mystic poet Niyâzî-i Mısrî. He died in Elmalı on 10 April 1657 and is buried in the tomb adjoining the mosque named after him. (Sources: TDV Encyclopaedia of Islam, 'Ümmî Sinan'; Elmalı District Governorate.)