Khawaja Muhammad Qamar Ud Din Sialvi (1906–1981) known as Shaykh-ul-Islam was a Pakistani Islamic scholar, religious leader and politician. He was a Waliullah (Sufi saint) of the Chishti Sufi order; his Sufi convent (zawyah) is located in the village of Sial Sharif. He was also the founder of the Sunni Barelvi political party Jamiat Ulema-e-Pakistan (representing the Ulama of the Ahl-e-Sunnah Wa-al-Jamaa'ah denomination in Pakistan) and became its president in 1970. He is also credited for being one of the foremost and staunchest supporters of the movement for the creation of Pakistan.