Thiruvalluvar (Tamil: திருவள்ளுவர்) is a celebrated Tamil poet who wrote the Thirukkural, a work on ethics in Tamil literature. He is also known by other names like Theiva Pulavar, Valluvar and Poyyamozhi Pulavar. Thiruvalluvar was born at Mylapore. His wife Vasuki was a chaste and devoted lady, an ideal wife, who never disobeyed the orders of her husband, but always carried them out implicitly. Thiruvalluvar showed people that a person could lead the life of a Grihastha or householder, and at the same time, lead a divine life or a life of purity and sanctity. He showed people that there was no necessity to leave the family and become a Sannyasin to lead a divine life of purity and sanctity. All his wise sayings and teachings are now in book form and known as ‘Thirukkural’. The Tamil Calendar is dated from that period and referred as Thiruvalluvar Aandu (Year). The time period of Thiruvalluvar's existence has been based on mostly linguistic evidences rather than archeological evidences since none such has been determined. His period has been estimated to be between 200 BC and 30BC.