Tirunelveli District was formed on September 1, 1790 (Tirunelveli Day) by the East India Company (British) and named it as Tinnevelly district. The history of Tirunelveli was researched by Robert Caldwell (1814–91), a Christian missionary who visited the area. After acquiring Tirunelveli from the Nawab of Arcot in 1801, the British anglicised its name to "Tinnevelly" and made it the headquarters of Tinnelvelli District. The administrative and military headquarters was located in Palayamkottai (anglicised as "Palankottah"), from which attacks against the "polygars" were launched. After independence both cities reverted to their original names, and Tirunelveli remained the capital of Tirunelveli district. In early 1900's, parts of Tirunelveli district was made as Ramanathapuram and Virudhunagar districts. In 1986, Tirunelveli district was further split into two districts for administrative purpose such as Chidambaranar (present-day Thoothukudi district ) and Nellai-Kattabomman (later Tirunelveli-Kattabomman, present-day Tirunelveli districts). In 2019, Tenkasi was split from Tirunelveli District forming Tenkasi District.