The ethnonym "Brahui" is a very old term and a purely Dravidian one. The fact that other Dravidian languages only exist further south in India has led to several speculations about the origins of the Brahui. There are three hypotheses regarding the Brahui that have been proposed by academics. One theory is that the Brahui are a relict population of Dravidians, surrounded by speakers of Indo-Iranian languages, remaining from a time when Dravidian was more widespread. Another theory is that they migrated to Baluchistan from inner India during the early Muslim period of the 13th or 14th centuries. A third theory says the Brahui migrated to Balochistan from Central India after 1000 AD. The absence of any older Iranian (Avestan) influence in Brahui supports this last hypothesis. The main Iranian contributor to Brahui vocabulary is a northwestern Iranian language, Baluchi, Sindhi and southeastern Iranian language, Pashto.
The History of the Brahui emerges from total darkness with the displacement of a shadowy Hindu dynasty in Kalat called Sewa by the Mirwari Brahuis. There is a Mughal interlude and then Brahui ascendancy again.
It is said that a Hindu dynasty, the Sewa by name, ruled over this part of the country prior to the seventh century, Kalat is still known as Kalat-i-Sewa.
The Brahui language is a language within the Dravidian subgroup of languages. While it does contain many words similar to their equivalents in the Iranian Baloch language, it also has many loan words from Indo-Aryan languages as well as the Dravidian words of its own. It is mainly spoken in the Kalat areas of Balochistan, Pakistan, and in Southern Afghanistan, as well as by an unknown very small number of expatriates in the Gulf states, Turkmenistan, as well as Iranian Balochistan. It has three dialects: Sarawani (spoken in the north), Jhalawani (spoken in the southeast), and Chaghi (spoken in the northwest and west) The 2013 edition of Ethnologue reports that there are some 4.2 million speakers; 4 million live in Pakistan, mainly in the province of Balochistan. Due to its isolation, Brahui's vocabulary is only 15% Dravidian, while the remainder is dominated by Balochi, and Indo-Aryan languages (for example, of the number names from "one" to "ten," "four" through "ten" are borrowed from Persian ), while the grammar and overall morphology still resemble other Dravidian tongues. Brahui is generally written in the Perso-Arabic script and there is even a Latin alphabet that has been developed for use with Brahui.
Brahuis display a variety of Y-DNAhaplogroups, the two most important being haplogroup R1a - with its mass diffusion among populations of Central/South Asia and associated with the early eastern migrations of Indo-Iranian nomads - and haplogroup J, which, though found among other subcontinental peoples, is nevertheless more typical of Near-Eastern populations. Other, relatively minor, low-frequency haplogroups among the Brahui are those of L, E1b1a, G, and N.