It is worth sharing that linguistically Dimasa, Koch, Bodo, Kokborok, Deori, Garo, Rabha, and Tiwa are cognate groups. Shafer (1955: 107) classified them under Barish Section (aka Boro-Garo) of Baric Division language family. Grierson, in his work, shared "it said that some 200 years ago, the Raja of Hill Tipperah, when giving his daughter in marriage to the Raja of Maibang in the North Cachar (present Dima Hasao), gave her a dowry the Surma Valley in what is now known as the district of Cachar.". In the sixteenth century, a
Koch principality was established in
Khaspur by Chilarai, who made it a “crown colony” of Koch Behar under Uparaja, who later declared his independence and formed the Kingdom of Khaspur. However, since the beginning of the eighteenth century, this Kingdom was declining; its last ruler Bhimsingha, was growing old with no male heir. His only daughter Kanchani, was given in marriage to the Dimasa prince Lakshmi Chandra in 1745 A.D. Shortly after the demise of Bhimsingha, the two states (Maibang and Khaspur) were merged, and the capital of Dimasas was shifted from Maibang to Khaspur, near Silchar, the Cachar valley or South Cachar (aka Barak Valley) became the core area of the Dimasa state. The North Cachar Hills (present Dima-Hasao) was administered by a Dimasa governor and Central Cachar (Nagaon portion) through an Aditya or Sezwal. Members of the royal family and a large number of the aristocracy moved to the plains of Cachar. The aristocracy which settled in Cachar formed a Hindu caste called
BARMAN and consecrated as Kshatriya by Brahmanas and allowed to put on
sacred threads (Janeo). Thus, Barman is a Hindu name of Dimasa. ==Religion==