كسرى الأول
Keikavus states in the book, that the grandmother of his father, was descended from Sasanian king Khosrau I. He also states that his mother was a Ghaznavid princess, and that his great-grandmother of his father's side was the daughter of Hasan ibn al-Fairuzan, a noble of Tabaristan and a relative of Makan ibn Kaki.