Ghiyas-ud-Din Zain-ul-Abidin (r. 1418–1419, 1420–1470) was the eighth sultan of Kashmir. He was known by his subjects as Bud Shah (the Great King). The first 35 years of his reign are described by Jonaraja in the Rajatarangini Dvitiya, while the subsequent years are described by his pupil, Srivara, in the Rajatarangini Tritiya.