Oonattukara consisted of four kovilakams-Perakathu,Cherayi,Puthiyidathu,Pazhedathu.The eldest one of these Kovilakams was made the king of Oonattukara.Later Oonattukara splitted into two. Of these one was conjoined to Venad.The other remained as Kayamkulam

In 1737 Ramayyan became the dhalava of Venad.During his period Mavelikara came into prominance as a major business centre of Venad.I n the meantime Achutha warrier, the army cheif of Kayamkulam was killed by dhalava. This forced Kayamkulam to surrender.After this Ramayyan constucted 'Pandakasala' at Mavelikara.

An agrrement was signed by the Dutch and Travancore in 1753.In this accord Dutch conceded not to attack Travancore.This agreement was signed at Mavelikara.As a memorial to this agreement Dutch donated a pillar light ( sthamba vilakku ) to Sree Krishna temple at Mavelikara.In this vilakku we can see a Dutch soldier with his head bowed holding a gun upside down.Ramayyan also constructed a 'kotta' ( fort) at Mavlikara. After the rule of Velu thampi dhalava, Lord Mekkala destroyed it in 1809.This place at the heart of the town today also known as Kottakkakam. Near Sree Krishna Temple there is a building called Dhalava madom.

In order to keep the continuity of the dynasty Sree Moolam Thirunal adopted two princess from Mavelikara.The elder one Sethu Lakshmi Bhai ruled Travancore as the Regent.The younger one was Sethu Parvathi Bhai whose son Sree Chithira Thirunal was the famous and the last ruler of Travancore.Recently the Travancore royal family adopted princess Lekha from Mavelikara.

As a result of the close association with the Tavancore royal family, Mavelikara gained modern facilities well ahead of other places in the state.This includes a fullfledged transport station and its development into a municipality. Even before India attain independence ,Mavelikara had to its credit a super express transport service to Trivandrum.