The village gets name after Duna, the founder of Bhadaur House of the Phulkian States. Duna, the founder of the family, lived at Bhadour with his brother Ala Singh, Until the latter left for Barnala in 1718, when Bhadour came into his sole possession. 
Lepel H. Griffin writes that Duna, the founder of the family, lived at Bhadour with his brother Ala Singh, Until the latter left for Barnala in 1718, when Bhadour came into his sole possession. He was a man of peace, and, not being a Sikh, he did not join his kinsmen in rebellion against the Muhammadan Empire, by which he had been entrusted with authority, as Chaudhri over Sangrur, Bhadour and other districts, which his father Rama had enjoyed according to Sanads.
In 1725, the Muhammadan Governor of Lahore demanded the customary payment and Duna left for the capital, his brothers promising to sent their quota after him. This they failed to do, and Duna, and his son Dau, were thrown into prison, in which the latter died. The intercession of a friend, Shaikh Alayas of Khawaspur, obtained the release of Duna, but the hardships of his imprisonment destroyed his health, and, after returning to Bhadour, he died there in the year 1726. He left four sons, of whom Bigha succeeded him; the youngest, Suma Singh, being the ancestor of the Rampuria Sardars.
Bigha, that he resolved to resign his office of Chaudhri and become a recluse ; but the Phulkian Chiefs induced him to abandon this design, and he married a second wife who bore him Chuhr Singh and Mohr Singh. His third wife, was the widow of his brother Sukhu Singh. She became the mother of Dal Singh, from whom the Sirdars of Kot Duna, a village founded by Chaudhri Duna, have descended.
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- The Rajas of the Punjab by Lepel H. Griffin/The History of the Bhadaur Chiefship, p.278
- Latif, S.M., History of the Punjab
- A collection of treaties, engagements, and sunnuds, relating to India By India Foreign and Political Dept, Charles pp.274
- The Rajas of the Punjab by Lepel H. Griffin/The History of the Bhadaur Chiefship, p.278-280