Thiruvalluvar is a celebrated Tamil poet and philosopher whose contribution to Tamil literature is the Thirukkural, a work on ethics. It is believed that he was born either in Thiru Mylai (Mylapore) Chennai in Tamil Nadu or in ThirunainarKuruchi, a village in Kanyakumari District of Tamil Nadu.Thiruvalluvar is thought to have lived sometime between the 4th century BC and the 1st century BC The Tamil poet Mamulanar of the Sangam period mentioned that Thiruvalluvar was the greatest Tamil scholar and Mamulanar also mentioned the Nanda Dynasty of northern which ruled until the 4th century BC. This estimate is based on linguistic analysis of his writings, as there is no historical evidence for when and where he lived.