Eastern Tamils had feudal organizations that centered around Ur Podiyar at a village level and the Kudi system that controlled social interactions. They also were organized politically as Vannimai chiefs who came nominally under the Kandyan kingdom. The most important social group were the Mukkuvar who had originated from South India and had repeatedly invaded Sri Lanka as evidenced by Sinhalese literature of that period called Kokila Sandeśa as the Mukkara Hatana. One of the local traditions that records the landing and settling of eastern Sri Lanka is called "Mattakallappu Manmiam" (Tamil:மட்டக்களப்பு மான்மியம்).