Kathmandu Valley and aboriginal  Tharu  in the southern Terai region. The ancestors of the  Brahmin  and Chetri  caste groups came from India's present  Kumaon ,  Garhwal  and  Kashmir  regions, while other ethnic groups trace their origins to North  Burma  and  Yunnan  and Tibet, e.g. the  Gurung and  Magar  in the west,