 Whether Yazdegerd's death was in Tus or Gurgan, the legend was probably fabricated by the Parthian nobility who had Yazdegerd I killed in the distant northeast (the traditional homeland of the Parthians and part of the fiefdom of three strong Parthian families, including the Kanarangiyan, who were based in the Tus region).The nobility and clergy, who despised Yazdegerd I, now strove to strip his sons of kingship.Three are known