Tai Ahom

The Ahom (Pron: /ˈɑːhɑːm, ˈɑːhəm/, Assamese: আহোম, people of Assam) are the descendants of the ethnic Tai people that accompanied the Tai prince into the Brahmaputra valley in 1228 and ruled the area for six centuries. Sukaphaa and his followers established the Ahom kingdom (1228–1826) and the Ahom dynasty ruled and expanded the kingdom until the British gained control of the region through the Treaty of Yandabo upon winning the First Anglo-Burmese War in 1826.
The modern Ahom people and their culture are a syncretic blend of the original Tai culture, the indigenous Tibeto-Burmans and Hinduism. Some ethnic groups, including the Tibeto-Burman speaking Borahi people, were completely subsumed into the Ahom community. Members of other communities, based on their allegiance to the Ahom kingdom or the usefulness of their talents, were accepted as Ahoms. Nowadays Ahoms form the largest mongoloid community of Assam and North East India. They are in majority in Upper Assam
The Tibeto-Burman locals near the Ahoms gave them the name "Ahom"