A Naga, son of Kadru.

Antecedents: Vishnu, Brahma, Marichi, Kashyapa, Akarkkara.

Birth: Kashyapa married Aditi, Diti, Danu, Kaalika, Tamru, Krodhavasha, Manu, Anala, all daughters of Daksha. Krodhavasha had ten children, one of whom was Kadru. Anantha, Akarkara etc were the children of Kadru, as per Mahabharata, Adiparva, Chapter 35, verse 16.