Among the earliest inhabitants were the aboriginal Tharu in the southern Terai region. The ancestors of the Brahman 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, Rai and Limbu in the east(from Yunnan and north Burma via Assam), and Sherpa and Bhotia in the north(from Tibet).

source: http://en.wikipedia.org/wiki/Nepal
 Rai Limbu, Gurung kaha jane? Yunan and Burma
Bahun chetri kaha jane? Jammu Kashmir (j hos najikai chha)
Newar, sherpa, bhote jane Tibet.
Nepal ma basne ko ? Just Tharu

Chill,
Aafno aafno thegana thaha vayo haina aba? Bhutra ko tachhad machhad?