Tags: Monarch.
Sharif ul-Hashim (began reign November 17 1405) was the regal name of Sayyed Abubakar Abirin. He was an Arab-Muslim explorer and the founder of the Sultanate of Sulu. He assumed the political and spiritual leadership of the realm and was given the title Sultan and was also the first Sultan of Sulu.During his reigning era he promulgated the first Sulu code of laws called Diwan that were based on Quran.