High Quality Content by WIKIPEDIA articles! Berke Khan (died 1266) (also Birkai; Mongolian: Бэрх хаан) was the ruler of the Golden Horde who effectively consolidated the power of the Blue Horde and White Hordes from 1257 to 1266. He succeeded his brother Batu Khan of the Blue Horde (West) and was responsible for the first official establishment of Islam in a khanate of the Mongol Empire. He allied with the Egyptian Mamlukes against another Mongol khanate based in Persia, the Ilkhanate.