Kilavan Sethupathy, The Kingdom of Ramnad originally comprised the territories of Ramnad, Sivaganga and Pudukottai of today. Regunatha Sethupathy alias Kilavan Sethupathy, the 7th King of Ramnad reigned between 1674 and 1710. Kilavan Sethupathy, came to know of the bravery and valour of Peria Oodayan of Nalukottai, 4 Kilometres from Sholapuram near Sivaganga.
Vijaya Regunatha Sethupathy, The King assigned to Peria Oodayan of Nalukottai a portion of land sufficient to maintain 1000 armed men. Vijaya Regunatha Sethupathy became the 8th King of Ramnad in 1710 after the death of Kilavan Sethupathy. The King gave in marriage his daughter Akilandeshwari Nachiar, to Sasivarnan, the son of Nalukottai Peria Oodayan. The King gave Sasivarna Thevar lands as dowry, free of taxation, sufficient to maintain 1,000 men. He placed him in charge of the fortresses of Piranmalai, Tiruppathur, Sholapuram and Tiruppuvanam as well as the harbour of Thondi. Meanwhile Bhavani Sankaran, the son of Kilavan Sethupathy conquered Ramnad territory and arrested Sundareswara Regunatha Sethupathy, the 9th King of Ramnad. Bhavani Sankaran proclaimed himself as the Rajah of Ramnad. He became the 10th king of Ramnad and he reigned from 1726 to 1729.
1st Raja Sasivarnan (1730 - 1750), Kattayan divided Ramnad into five parts and retained three for himself. He granted the two parts to Sasivarnan of Nalukottai conferring on him the title of "Rajah Muthu Vijaya Regunatha Peria Oodayan ".
2nd Raja Muthu Vaduganathan (1750 - 1772), Sasivarna Peria Oodayan died in or about the year 1750. He was succeeded by his only son Muthu Vaduganathan. He was the second Rajah of Sivaganga. His wife Rani Velu Nachiar acted as "friend, Philosopher and guide" to him. Tandavaraya Pillai was the able minister of Sivaganga country. Muthu Vaduganathan granted commercial facilities to the Dutch only after the British rejected a similar offer, made to Colonel Heron.
3rd Rani Velu Nachiar(1772 - 1780), Rani Velu Nachiar and her daughter Vellachi Nachiar lived under the protection of Hyder Ali at Virupakshi near Dindigul. Frustrated by the joining of forces against him, the Nawab ordered that Velu Nachiar and Marudhu Brothers were permitted to return to Sivaganga and rule the country subject to payment of Kist to the Nawab. Abiding by this Order, Rani Velu Nachiar accompanied by Marudu brothers and Vellachi Nachiar entered Sivaganga. An agreement was reached where by Rani Velu Nachiar was permitted to govern the Sivaganga Country and Chinna Marudu, the younger was appointed her minister and the elder Vellai Marudu as the Commander-in-chief. Thus the widow Queen Velu Nachiar succeeded her husband in 1780.
Maruthu brothers(1748-1801), The Queen Velu Nachiar granted powers to Marudhu Brothers to administer the country in 1780. Velu Nachiar died a few years later, but the exact date of her death is not known (it was about 1790). Marudu brothers are the sons of Udayar Servai alias Mookiah Palaniappan Servai and Anandayer alias Ponnathal. They are native of Kongulu street of Ramnad. They belonged neither to the family of the ancient poligars nor to their division of the caste.
Sivaganga has an average elevation of 102 metres (334 feet).