Kia'i, Amīr Kīāʾī or Kar Kia dynasty was a Zaidi Shia dynasty which ruled over Bia pish (eastern Gilan) from 1389 to 1592. They claimed Sasanian ancestry as well.
Kia'i helped shah Ismail I establish the Safavid Empire and Kia'is later became a vassal state of the Safavid Empire. The Safavid king, Abbas I put an end to the Kia'i dynasty by dispatching its Army to Gilan in 1592.
References
Kia'i dynasty Wikipedia(Text) CC BY-SA