Anu was son of Vilomā (Viloma) in the line of Andhaka of the Vṛṣṇi (Vrishni) clan. He was a friend of Tumburu, a noted gandharva (a kind of demigods) musician. This ancestor of Vasudeva apparently was also known as Ānakadundubhi (Anakadundubhi). But the Bengali edition of Viṣṇupurāṇa (Vishnupurana) identifies the son of Viloma as Bhava.
This confusion over the identity of Anu created by two different editions of Viṣṇupurāṇa gets largely cleared from Bhāgavatapurāṇa (Bhagavatapurana), which states that Viloma of the Andhaka clan sired Kapotaromā (Kapotaroma), whose son was Anu, bosom friend of Tumburu the demigod musician. Anu’s sons were Andhaka and Dundubhi. If the word Andhaka is to be considered Ānaka (Anaka), as certain grammatical modification does permit, then we find that the earlier-found name Ānakadundubhi is a composite referring to the names of two different scions of this line, i.e., Andhaka and Dundubhi.