What is "zain-ul-abidin"

'Ghiyas-ud-Din Zain-ul-Abidin (reigned: 1418–1419 and 1420–1470 ) was the eighth sultan of Kashmir. He acquired a halo in popular imagination which still surrounds his name in spite of the lapse of nearly five hundred years. He was known by his subjects, and indeed still is, as Bud Shah (the Great King).

The first thirty-five years of his reign are described by Jonaraja in the Rajatarangini Dvitiya, while the subsequent years are described by Jonaraja's pupil, Srivara, in the Rajatarangini Tritiya.