The earliest mention of the Tatars (also called Dada 達靼, 达打, 達達, Dadan 達怛, 達旦, Tatan 塔壇, Tatar 塔塔兒) as Oghuz-Tatar is found on a stone inscription in archaic Turkish from the 8th cenutry. Their language belongs to the western branch of the Turkic languages (Altaic language family). The first mention of the Tatars in Chinese sources occurs around 840 when they migrated south to modern Mongolia where the tribes of the Huihu 回鶻 had lived. Their subtribes were called zubu 阻卜. During the 10th century they sent embassors to the Liao Dynasty 遼 court whose emperor enfeoffed the Tatar chieftain as king and installed military commisioners (jiedushi 節度使) and so-called bandit suppression commissioners (zhaotaoshi 招討使) in the area of the river Orkhon. The whole 11th century faced rebellions of the Tatars against the Chinese government. The following Jin Dynasty 金 had to build fortified walls against the very active tribes of the Kereyid ("Kelie 克烈"), Naiman ("Naiman 乃蠻"), Önggüd ("Wanggu 汪古"; called White Tatars), Tartars ("Tata'r 塔塔兒"), and Mongols (Mongqols; "Menggu 蒙古", or "Mengwu'r 蒙兀兒"; called Black Tatars). After Chinggis Qaghan founded the Mongol federation, all incorporated tribes were called Mongols without distinguishing their real ethnical background. After the Ming Dynasty 明 was founded and the Mongols withdrew to the northwest, the word "Dada" was a common designation of the scattered Mongol tribes. In 1480 Batu Mengke 巴圖蒙克 (or 把禿猛可) reunited the Tatar tribes as Dayan Qaghan 達延汗 (also "Daiyanha 歹顔哈", "Dayanhan 答言罕") "Great Qaghan of the Great Yuan Dynasty" (Dayuan Da Kehan 大元大可汗), after his death in 1517 succeeded by Anda Qaghan 俺答汗. He was officially enfeoffed as king by the Ming court and introduced Tibetian Buddhism in Mongolia. The last chieftains of the Tatars were fighting against the Qing Dynasty 清 but soon submitted.