Onattukara is known as the land of Onam in ancient Kerala. It is known as Odanadu (land of bamboo).Onattukara was part of the kingdom of Venad and comprises of the present taluks of Mavelikara, Karunagapalli and Karthikapalli . Historical evidence shows that centuries ago Onattukara was a flourishing centre of culture and civilization.The area is very famous for its coconut cultivation and the population almost depend on it for their livelihood.
the capital of Onattukara was moved from Kandiyoor-Mattom, Mavelikkara to Eruva and Krishnapuram, near Kayamkulam, which led to the state being called Kayamkulam. After this shift, Kayamkulam became the commercial capital of Onattukara, while Mavelikkara remained the cultural capital. Odanad was controlled by Nair lords, among whom the ruler of Kayamkulam was the most prominent.
The Sri Krishna Swamy Temple in Eruva, located two kilometres north of Kayamkulam, is one of the prominent establishments in Onattukara.The company constitutes 11 Federations from 129 CPSs and is located at Vetticode in Kattanam Village of Mavelikara Taluk.