Sethur in the Srivilliputtur taluk, at the foot of the Western Ghats, northwest Tirunelveli, is traditionally recognized as one of the 72 palayams of Madura.
Sethur today comes under Virudhunagar District of Tamil Nadu.
Thiruvonnaatha Thevar was sent to protect the northwest area of Madura, which had been usurped by a neighboring raja.
He expelled the intruders, built a fort in Sethur and was made a polygar.
Polygar Tiruvana (Tiruvannata) Thevar was among the recipients of the letter Ranga Pillai wrote in 1751 in behalf of Dupleix to the 72 poligars of Trichinopoly.Now the Poligar Named "Sevuga Pandiya Thevar".