Kay Khosrow sacrificed for Anahita in Lake Chichast for winning a chariot race. He killed Afrasiyab in  Lake Chichast as revenge for Siavash who had been killed by Aγraēraθa, son of Naru.
In Avesta, Kay Khosrow has the epithet of 𐬀𐬭𐬱𐬀 𐬀𐬌𐬭𐬌𐬌𐬀𐬥𐬄𐬨 𐬛𐬀𐬒  𐬌𐬌𐬎𐬥𐬄𐬨 "arša airiianąm dax́ iiunąm", meaning "stallion of the Aryan lands". According to Avesta, Kay Khosrow had a son called Āxrūra.