According to Vāyupurāṇa(Vayupurana) Ṛtasāvarṇi(Ritasavarni) is the son of Rudra-Śiva(Siva). In the twelfth Manvantara of the future, he will be Manu, ruler of the Manvantara. In other Purāṇas (Purana; Mythological Scriptures), he is mentioned as Rudrasāvarṇi (Rudrasavarni).