Muhammad Ilyas Ruhiat (January 31, 1934 - December 18, 2007) better known as Ajengan Ilyas was an Indonesian Ulama and the leader of Cipasung Islamic Boarding School and also a Leader of Supreme Council (Ra'is 'Aam) Nahdlatul Ulama from 1992 until 1999. He was born at Tasikmalaya,