Alp Arslan (; Persian: آلپ ارسلان; full name: "Diya ad-Dunya wa ad-Din Adud ad-Dawlah Abu Shuja Muhammad Alp Arslan ibn Dawud"; 20 January 1029 – 15 December 1072) was the second Sultan of the Seljuk Empire and great-grandson of Seljuk, the eponymous founder of the dynasty.
Od na videz podobnih jetrnjakov (Marchantiophyta ali Hepaticae) jih lahko ločimo po večceličnih rizoidih.