There were eight gaṇa (gana; groups) of deities in the epoch of Vaivasvata. Other than the seven gaṇa Āditya (Aditya), Vasu, Rudra, Sādhya(Sadhya), Viśva (Vishva), Marut, Bhṛgu (Bhrigu), the eighth was Aṅgirogaṇa (Angirogana). They are the descendants of Aṅgirā (Angira).