Vijayaraghunatha Sethupathi (died 1720) was the ruler of the Kingdom of Ramnad from 1710 to 1720. He was son of Raghunatha Kilavan, the founder of the kingdom.
According to a 1713 letter written by Christian missionary Martin, Vijayaraghunatha Sethupathi was the second son of Raghunatha Kilavan, the founder of the kingdom. Martin writes
Vaduganatha Deva is master of a good part of Marava. All the kingdom belonged to him by right, for he is the elder; but he gave sovereignty over it to his younger brother, who, he thought had more talent for government than he
Vijayaraghunatha Sethupathi had two daughters: Sivagami Nachiar and Rajeswari Nachiar. The story is that both his daughters fell in love with the same man and the king got them both married to him. He also gave him a small portion of his kingdom to take care of.
There was a ferry service between Kashi and Rameshwaram. This ferry ride was free of cost for pilgrims and this decree was given by the king. His son in law decided to charge a very small fare for this ferry from pilgrims. Many pilgrims were turned away because they weren't able to afford the ferry which was not free anymore. One such determined pilgrim decided to directly approach the king regarding this matter. This is when it comes to the king's notice that the ferry which is supposed to be free was not free anymore. The king flew into a fit of rage and had his own son in law arrested. Meanwhile the king's two daughters once they heard of this decided to come and beg their father to let their husband go. The king, however, had already passed a death sentence on his son in law. While the women were on their way, they get the news that their way to meet their father they find out that their husband had been beheaded. They kill themselves in that very same spot. The place where the first daughter died is called Akkamadam and where his second daughter died is called Thangachimadam.
On his deathbed, Raghunatha Kilavan allegedly chose heir apparent Vijayaraghunatha Sethupathi as his successor.
Vijayaraghunatha was a ruler of considerable ability. The kingdom was on the brink of a famine when he ascended the throne but he handled the situation appreciably well. He set up his base in the fortress of Aranthangi. With the assistance of French engineers he built a fort in Gundar in Kamudhi in Ramanathapuram district. Being a pious Hindu, Vijayaraghunatha frequently visited the temple at Rameswaram and made donations.
Vijayaraghunatha was initially favourable in his attitude towards Christians. He even made lavish donations for the construction of a church in Aranthangi in 1711. However, his attitude changed during a visit to Rameswaran in 1714-15, when his brother-in-law, Tiruvaluvanathan, whom he had appointed to govern the state in his absence, visited the church in Aranthangi and participated in Christian ceremonies. This, combined with tales of alleged atrocities of Christian missionaries, turned Vijayaraghunatha against them. He gave orders to exterminate Christianity from the kingdom and prohibited proselytising.