Shri Sarveshwar Singhji was Senapati (Military General) of Raja Man Singh I of Amer who had come to conquer Bengal when Emperor Akbar granted Subahdari of Bengal, Bihar and Orissa to Raja Man Singh.He together with the rajput infantry and cavalry invaded the deep forest region in Bengal known as Jungle Mahal.The region was popularly ruled by the local Mal chieftains who were defeated and vanquished by the rajputs. Hence he assumed the title “Malla Dev” which became part of the name and style of his descendants. Sarveshwar Singhji belonged to the Chauhan clan of Rajputs from Fatehpur Sikri in Rajputana.
As a reward, Raja Man Singh I of Amer, granted mansabdari of the entire region of Jungle Mahal to his victorious Senapati Sarveshwar Singhji under suzerainty and subordination as a tributary vassal state to the Mughal Emperor Akbar. He named his new capital Jhargram which means a village surrounded by deep forests and fortified his kingdom with a canal-ed fort known as “Ugal” in local language, respectfully the title of “Ugal Sanda” (Lord of thee Fort) was conferred to the Raja and his successors.