Sudoiphaa or Tej Singha was the king of Ahom kingdom from 1677 CE to 1679 CE. After deposing king Sujinphaa, Atan Burhagohain, the Prime-Minister of Ahom Kingdom, installed Sudoiphaa in the throne. Sudoiphaa’s reign witnessed the end of the ministerial dictatorship of Atan Burhagohain and rise of Laluksola Borphukan, the Ahom Viceroy of Guwahati and Lower Assam, as the real authority behind the throne. In order to gain absolute authority in the Royal Court, Laluksola Borphukan, treacherously surrendered the garrison of Guwahati to Mughals, and held Atan Burhagohain and other nobles as captive. Sudoiphaa’s effort to reestablish his authority and bring the ambitious Laluk Sola Borphukan to justice for his treachery against his country and collaboration with the foreigners, finally led to his own deposition and execution by the ambitious minister.
Sudoiphaa belonged to the Parvatia line of Royal Ahom Dynasty. His early name was Khamcheo. He was the grandson of Parvatia Deka Raja, who was the son of Prince Sukrang, founder of Parvatia line of Royal Ahom Dynasty and grandson of Ahom king Suhungmung. During his early life as a prince, he was engaged in agricultural activities, living at his residence near Charaideo hills.
In 1677 CE, conflict broke out between the reigning monarch Swargadeo Sujinphaa and Atan Burhagohain, the Prime-Minister of Ahom kingdom. A civil war ensued between both sides, in which Atan Burhagohain emerged victoriously. The king was deposed and later executed. The nobles pressed Atan Burhagohain to assume sovereign power, but the Premier refused the offer stating that only members of Royal Ahom Dynasty, the direct descendant of first Ahom king Sukaphaa, were eligible for the throne. Also the Tai-Ahom priestly clans, the Deodhais, and the Bailongs, who considered themselves as the guardian of the throne, strongly opposed the elevation of any person of non-royal blood as the king. Therefore the Premier instituted a vigorous search for a prince worthy of occupying the exalted office of a sovereign. He found prince Khamcheo suitable for the office of king and placed his proposal in front of the other nobles. The nobles consented with the choice of Atan Burhagohain and agreed to accept his nominee as the king. Khamcheo was brought from his residence at Charaideo hill and the nobles and other officers paid their homage to the new monarch. The coronation ceremony of the new king, the Singarigharutha ceremony, took place at Chunpora Nagar, in which the Tai-Ahom priest conferred him the Ahom name Sudoiphaa, while the Hindu priests conferred on him the title Tej Singha. He was commonly known as Parvatia Raja from the fact of his residence at Charaideo Parvat (literally in the Assamese language it means mountain or hill). On ascending the throne, Sudoiphaa performed the Rikkhvan ceremony, the Tai-Ahom ceremony for obtaining long life and offered sacrifices to Hindu god Shiva as well as to the Ahom gods.