Who was XXX's father?
Alp Arslan
Alp Arslan (Honorific in Turkish meaning ``Heroic Lion''; in Persian: آلپ ارسلان‎‎; full Persianized name: Diya ad-Dunya wa ad-Din Adud ad-Dawlah Abu Shuja Muhammad Alp Arslan ibn Dawud ابو شجاع محمد آلپ ارسلان ابن داود;‎ 20 January 1029 -- 15 December 1072), real name Muhammad bin Dawud Chaghri, was the second Sultan of the Seljuk Empire and great-grandson of Seljuk, the eponymous founder of the dynasty.