Aq Kübek Khan (?âÂÂ~1550; also Aq Köbek), was a ruler of Astrakhan Khanate in 1532âÂÂ1534 and 1541âÂÂ1544. He was the son of Mortaza Beg. He pursued politics against Crimean Khanate and Nogay Horde for the Astrakhan Khanate's independence. He was overthrown by Yamghurchi khan. For uncertainties and additional information, see the second part of List of Astrakhan khans.