Katāyoun is a female figure in Shāhnāme and Iranian mythology. She is the wife of Goshtāsb and the mother of Esfandiār. Her name means "Queen of the world". In Shāhnāme, she is the daughter of the Kaiser of Rûm. But in Avestā and in Pahlavi texts, she is an Iranian girl and a descendant from Nowzar. In Avestā and pahlavi texts, her name is mentioned as Hutaosā.