In Irish mythology, Danu or Dana, also called Anu or Ana, was the mother goddess of the Tuatha Dé Danann (peoples of the goddess Danu), although little is recorded about her as a character. Her Welsh equivalent is Dôn.

Danu, a Hindu primordial goddess, is mentioned in Vedic texts. The word Danu described the primeval waters which this deity perhaps embodied. She is called the mother of Vrtra, a demonic personality, who does combat and is defeated by Indra.