Koorathazhwan, also known as Kuresa and Srivatsanka Mishra, was the chief disciple of the great Vaishnavite Acharya Ramanuja. He assisted Ramanuja in all his endeavors. Koorathazhwan was born as Kuresan in a small hamlet 'Kooram' near Kanchi, in the year of 1010 A.D (Thai month, Hastham star) in an affluent family as the son of Sri Kurattazhwar. He belonged to the clan of 'Haritha', who were popular landlords.