"Bisu organised the different Bodo tribes of the region under his banner and launched a career of war and conquest and made the koches a power to be reckoned with.."(Nath 1989:16) Nath, D (1989). History of the Koch Kingdom: 1515–1615. Delhi: Mittal Publications. ISBN978-81-7099-109-0.
"The Koches 'who had a number of chiefs, at first independent, but who gradually united under the authority of one of themselves named Hajo. occupied Rangpur and Kamrup. He had two daughters, Hira and Jira of whom Hira was married to Hariya, a member of the "impure tribe" called Mech"(Nath 1989:17) Nath, D (1989). History of the Koch Kingdom: 1515–1615. Delhi: Mittal Publications. ISBN978-81-7099-109-0.
"In the records of the later Koch kings, we find an era dating from 1509/1510...(it is) but a commemoration date of (Bisu's) inheritance to his grandfather's property." (Nath 1989:28) Nath, D (1989). History of the Koch Kingdom: 1515–1615. Delhi: Mittal Publications. ISBN978-81-7099-109-0.
"Bisu, who might have fought Alauddin Hussain Shah or his government in Kamrup under the leadership of the Bhuyans and had a knowledge of their (the Bhuyans') military tactics..." (Nath 1989:22–23) Nath, D (1989). History of the Koch Kingdom: 1515–1615. Delhi: Mittal Publications. ISBN978-81-7099-109-0.
"It is interesting to note that Bisu, the founder of the dynasty and son of Haria Mandal, a chieftain of the Tibeto–Burman origin, discarded the tribal affinity of his father, but retained Koch identity of his mother (Bisu’s mother, Hira belonged to the Koch origin)"(Roy 2020) Roy, Gautam Chandra (2020), "Negotiating with the Changing Landscape: The Case of the Rajbanshi Community", Political Weekly, 55 (39)
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"It is common to believe Biswa Singha's origin as son of Siva was nothing but creation of the Brahmans...The Brahmans needed royal patronage and the king wanted legitimacy which could be obtained through the universal religion to teach the people to be obedient, patient and submissive"(Sheikh 2012:250) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
Sheikh 2012, p. 252. Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
"One such Brahman was Swarbabhuma who was appointed as Rajapurahita or royal priest and also adviser to the king"(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
"He brought some learned Brahmanas from Mithila, Benaras, Kanauj, and Srikshetra (Puri) to his kingdom in order to perform the Brahminical rituals....all these factors went a long way in effecting a rapid transformation of Koch Behar royal family from tribalism to Saivaism and Vaisnavism"(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
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"It is common to believe Biswa Singha's origin as son of Siva was nothing but creation of the Brahmans...The Brahmans needed royal patronage and the king wanted legitimacy which could be obtained through the universal religion to teach the people to be obedient, patient and submissive"(Sheikh 2012:250) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
Sheikh 2012, p. 252. Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
"One such Brahman was Swarbabhuma who was appointed as Rajapurahita or royal priest and also adviser to the king"(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.
"He brought some learned Brahmanas from Mithila, Benaras, Kanauj, and Srikshetra (Puri) to his kingdom in order to perform the Brahminical rituals....all these factors went a long way in effecting a rapid transformation of Koch Behar royal family from tribalism to Saivaism and Vaisnavism"(Sheikh 2012:251) Sheikh, Amiruzzaman (2012). "The 16th century Koch kingdom: Evolving patterns of sanskritisation". Proceedings of the Indian History Congress. 73: 249–254. ISSN2249-1937. JSTOR44156212.