Rai peopleThe Rai are an ethnolinguistic group belonging to the Kirat family and primarily Tibeto-Burman linguistic ethnicity. They mainly reside in the eastern parts of Nepal, the Indian states of Sikkim, West Bengal (predominantly Darjeeling and Kalimpong Hills) and in south western Bhutan. The Rais are a set of groups one of the oldest tribes of Nepal . They inhabited the area between the Dudh Koshi and Tamur River in Nepal. They claim that their country alone called (Kiratdesh) in modern times, they have spread over Nepal, Sikkim and West Bengal.
Sherpa peopleThe Sherpa are one of the Tibetan ethnic groups native to the most mountainous regions of Nepal, Tingri County in the Tibet Autonomous Region and the Himalayas. The term sherpa or sherwa derives from the Sherpa-language words ཤར ("east") and པ ("people"), which refer to their geographical origin in eastern Tibet. Most Sherpa people live in the eastern regions of Nepal and Tingri County in the Solukhumba, Khatra, Kama, Rowlawing, Barun and Pharak valleys, though some live farther West in the Bigu and in the Helambu region north of Kathmandu, Nepal.
Tamang peopleThe Tamang (; Devanagari: तामाङ; tāmāṅ), are a Tibeto-Burmese ethnic group of Nepal, Southern Bhutan and North India. In Nepal Tamang/Moormi people constitute 5.6% of the Nepalese population at over 1.3 million in 2001, increasing to 1,539,830 as of the 2011 census. The Tamang people are concentrated in the central hilly region of Nepal. Indian Tamangs are found in significant numbers in the state of Sikkim and the districts of Darjeeling and Kalimpong in West Bengal state.