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.