 Parts of Jaffna peninsula was historical divided into the three regions of Vadamarachchi, Thenmarachchi and Valikamam, which are today three sections of the Jaffna District.The Naga people were one of the ancient tribes of Sri Lanka, who were mainly concentrated in the Jaffna Peninsula.The Jaffna peninsula was also known in pre-mediaval era as "Naga Nadu", which means ""Land of the Nagas"" as mentioned in the twin epics of ancient Tamilakam, the Silappatikaram and Manimekalai.