The great sage Anantabhāgin (Anantabhagin) or Anantabhāgī (Anantabhagi) was one of those sages mentioned in Vaṃśapurāṇa (Vamshapurana, or the purāṇa with an account of all lineages) as the patriarchs and progenitors of the Bhārgava (Bhargava) line. He was related to Sage Bhṛgu (Bhrigu) by the association of being his disciple or of his biological lineage.