Kay Kāvus

Kay Kāvus (Persian: کی‌کاووس; Avestan: 𐬐𐬀𐬎𐬎𐬌 𐬎𐬯𐬀𐬥 Kauui Usan); sometimes Kai-Káús or Kai-Kaus, is a mythological shah of Greater Iran and a character in the Shāhnāmeh. He is the son of Kay Qobād and the father of prince Seyāvash. Kāvus rules Iran for one hundred and fifty years during which he is frequently though increasingly grudgingly aided by the famous hero Rostam. He is succeeded by his grandson Kay Khosrow.