Narantaka-Devantaka
Narantaka and Devanataka are demons and sons of Ravana who appear in a number of Hindu legends. They, along with Atikaya, are were created by Ravana from mandodari parvati. The son of devantaka, mahakantaka was the only survivor of raksha clan and was pardoned by Lord Rama and his army. He went far into the Kanyakubj desh and started following Brahmanism.
Later on his tribe amalgamated into Pulastya kul gotra of Kanyakubj brahman and are popularly known as pulastyaa gotra brahmans
