Scriptural texts mention a number of tribes that inhabited the region, such as the Sakas, the Nagas, Khasas, Hunas and Kiratas.
There is enough evidence from the pre-historical period of human habitation in these parts of the Himalayas. These include rock paintings, rock shelters, palaeoliths and megaliths.

According to the Tripuri people website, the Indus civilization was found to be comprised of heterogeneous group of human race. The skulls found of Harappa and Mahenjo-daro belonged to proto-australoid, Mongoloid, Mediterranean and Alpine races. This clearly proved that the mongoloid were also part of the Indus civlisation. The proto-australoid were ancestor of modern day's Santal, Kol, Bhil, Munda etc. tribes of central India, Mediterranean were ancestor of modern day's Tamil, Telegu, etc. but no skull was found of from the site of excavation belonging to Aryan people.

Who are the descendants of mongoloid living during Indus civilization in present day in India? These are none other than the present day's indo-mongoloid people or the Kirata or the Borok race living in India namely, Himalyan mongoloid tribes, Kinnours, Spitian, Lahuli, Nepalese, Koch, Mech, Bodo, Rabha, Garo, Tiwas, Dimasa, Kachhari, Karabi, Tripuri etc.

Where from the Kiratas had migrated:

China civilization Dadiwan culture of flourished between 8000-7000 years before present time. According to the Chinese legend the founder of Chinese civilization is Taihao Fasi, a legendary god in ancient Chinese civilization. Similarly our legend says Danghai Fa (Taihao Fasi) is the founder of Borok people. From this area a group of Chinese people migrated to the head water of Yangti river. After settlement in this area because of in fight a group of people migrated along the route of Sindu river under the leader of Donghorfa and settled civilization at Harappa around 6000 years ago.

Tracing the Origin of Kirata/Borok race and Tripuri people:

The Harappa civilization was of multi racial and multi ethnic one. The Kirata or the Borok race migrated in the Indus civilization site in the route of Khyber pass. They founded the Indus civilization under the king or leader of Donghorfa in the valley of Indus or Sindu river, called Harappa city. The mongoloid were most probably the ruler of the city by virtue if their past civilization at Dadiwan in china and their unconquerable nature.

Origin of the word Sindu or Indus river:

It is fact that the India or Indus or the Hindu had derived from the word Sindu river. But the Persian pronounced it as Hindu and the Greek/European as Indus. But what is the origin or root word of Sindu river? It has derived form the Kirata or Borok word of Chinti which means river of china people. Then it modified to Chinti>Sindi. So we can trace route like this Chinti> Chindi> Sindi>Sindu> Indus> India. Similar example still exist in the Kachhar district of Assam in the name race as Borak river which was earlier Borok twima.

Origin of Harappa word:

According to Tripuri legends passed through generations the first Father and mother of Borok people vis-à-vis the human race were Donghorfa and Donghorma, or also pronounced as Dangaima Dangaifa. The Aryan people could not pronounce it properly so the Donghorfa was split in to two words dong+horfa, the dong word was omitted and Horfa was misspelled and mispronounced in to Harappa, that is Horfa>Harappa. If we look at the history of Tripura, the kings of Tripura were titled as Fa till the Ratnafa who took title of Manikya. For example Muchungfa, Khichungfa, Rajafa, Achongfa etc. So it was this Donghorfa from which the Harappa had originated. In India none other than kings of Tripura took the title of Fa. It is one of the proofs of Borok race's king ruling the Harappa civilization and naming the city after the king's name. similar example exist in the name of most of cities/ towns of Tripura, Amarpur, Udaipur, Kalyanpur Dharma nagar, Agartala (Agarfa) etc.

More Proofs of Kiratas living in the Indus valley:

By the name of rivers in Indus valley:

There were many rivers that passed through the Indus civilization. According to famous ethnologist Cunningham any river whose name ends with ti or di indicates that it was once inhabited by Sino-Tibetan race. Most of the river name of Indus valley were in Borok/Kirata origin, for examples the ‘Ravi river' was earlier Rawa-ti, ‘Bias river' was Nyang-ti, ‘satlez' was-Zong-ti, ‘Para river' was Para-ti, Saraswati was Solsolti, Gomati was Gomati, Jammu tawi was Jomuti/Somti, Tapti etc. It clearly proofs that once in the ancient time these valleys were inhabited by Sino-Tibetan or Borok race. On the contrary there is no river whose name begins or ends with ti or di in the southern part of India, beyond the Bindhya parbat, which had never been inhabited by the Borok race.

By the name of place around Indus valley:

There are many places in the north India and sub-Himalayan area whose names are indication that the area had once been inhabited by the Indo-mongoloid races ‘Bodo/borok' branch. Prof. Suniti Kr. Chatterjee in his famous book of Kirat-Jana-Kriti mentioned that there was a city of Kiradu, now ruined, with its 27 temple in the western border of Rajasthan near the Indus civilization site. It means that the city was inhabited and founded by Kirata people. There was also a hamlet named ‘hathma' or ‘hatma' meaning wide land in Tripuri language, suggestive of Boro/k people's inhabitation in the Indus valley region. The capita city of India, Delhi is also considered to be derivatives of Kirata /Borok word dwi-lili>Dilli. There are plenty of similar examples in Assam like Dibrugor, Dihong, Digboi Dimapur, and many more.


Name of rivers and Places in the Sub-Himalayan region:

There are numerous examples that proves that Borok race once lived in the Himalyan region. Places name: Dehradoon>Di-ran-doong, Teheri>Tiyari, Kampti fall >Kapti > Kaptwi, Khumbu valley>Khumuk valley, Tripura Sundari Temple in Kulu etc.

Rivers Name: Bhagirathi>Bagroti, Gangutri>Gungti, Yamunatri>Yungti, Tista>Twisuta, Tursa>Twiursa, Riang twima, Terai>Twirai etc. These rivers flows from the Uttrakhand to North Bengal in sequences.

 Anthropological evidences:

There are many ethnological evidences that there was once habitation of Borok or Kirata race in the Indus valley. If through research and search are being carried out, there will be definite traces of Borok race in the Pakistan around the Indus area even now. The Kinnours, Lahuli etc. are still living in the Himachal Pradesh, who are none but Tibeto-Burman origin and are the people of Borok race who were left back at the time of migration. Similarly there are Rungsa who are still living in the Pithoragarh district of Uttaranchal whose mother tongue had been clubbed with Tripura language in the 1991 census and who claim to be Tibeto-Burman descendant. This Rungsa is none but the previous form of Reangsa of Tripuri Sub-tribe, who were left behind at the times of migration. There are many small tribes of Tibeto-burman race who are scattered in the Himalayan region.

Route of migration of Tripuri people in the present state:

From the Dadiwan area of China a group migrated to head water of Yangtze river around 7000 years ago. Then our ancestors migrated from this Yangtze river head to the site of Indus or Chindi river valley through Khyber pass around 6000 years ago, that is 4000 BC and founded the Indus valley civilization along with Proto-australoid and Mediterranean people. This civilization flourished between 4000-1900 BC. The Kirata or indo-mongoloid might have been the ruler as history proves that mongoloid race founded most of mighty empire in the past. When the Aryan nomadic tribes invaded Indus valley riding on the horse, the Borok race could not resist them and had to migrate towards the east along the path of sub-Himalyan region. Where as the Dravidian migrated to the south and the Australoid migrated to the east and middle of India. The Borok or Kirata migrated through Punjab, Jammu, Delhi, Himachal Pradesh, Uttaranchal, Nepal, north Bengal, Assam, Dimapur, Kachhar and finally reached in the present state of Tripura 1400 years ago, and then up to Coast of Bay of Bengal at Chittagong hill tract. On the way of migration many tribes were left behind who in the course of time formed a distinct tribes, but there linguistic and ethnic relation still exist. The descendant of Borok race are Kinnours, Rungsa, Koch, Mech, Hajong, Rabha, Bodo, Garo, Tiwas, Chutia, Karbi, Dimasa, Kachhari, and Tripuri.