	Yazdagird was the son of Shahriyar, who was the brother of the Bavand king Ardashir II of Tabaristan. During the reign of Yazdagird, his overlord, the Ilkhanate, were in a civil war. During this period, Yazdagird's kingdom experienced a period of relative prosperity and security. He is also known for building several madrassas in his capital, Amol. Yazdagird died in 1298, and was succeeded by his son Shahriyar V.