text: Mythology of Rai People Rai tradition relates that the first of the ancestral Kirati entered Nepal's eastern hills through the Barahachhetra gorge of the Kosi Valley the natural gateway into the region through the Mahabharat Range, which separates the hilly hinterland from the plains. According to the Mundum, in oral history, Kirati ancestors came out of the "Khuwalung" and then followed the small river of the Saptakoshi. They journeyed through the Arun, Dudh Koshi, Sun Koshi and Tama Koshi and finally settled down in the Bhote Koshi valley.
  According to the myths of the Kirati Rai people "Tayama" (elder sister), "Khiyama" (younger sister) and "Raichhakule" ( Tayama and Khimaya's younger brother) are supposed to be the primaeval ancestors of the Kirati Rai's Civilization. The sisters are believed to have lived in "Tuwachung" whereas the brother in the cave of Halesi. Tayama and Khiyama were skilful in weaving the looms. They are regarded as the pioneers of textiles. Tayama is recognized by names like: Khew, Toyama, Toma, Tayama, Tangwama, Jauma, Jaumo, Dawa and Kakcha, and accordingly, Khiyama is also called Khema, Khiwama, Khliuma, Khlemo, Khewa, Khauma and Los in distinct Kiranti languages. Raichhakule (younger brother of Tayama and Khimaya) also known as Hetchhakuppa, Hetchhakuwa, Khokchilipa, Khakchhilip etc. is considered to be the beginner of the agricultural era in the cultural history of Kirati- Rai People.