Danaus, in Grecian mythology, the son of Belus and grandson of Poseidon (Neptune) and Libya. He was the father of 50 daughters (the Danaides), and the mythical progenitor of the Danai or Argives. At the division of the possessions of Belus, Danaus received the kingdom of Libya, while his twin brother AEgyptus became the ruler of Arabia. Believing that the 50 sons of his brother were plotting against him, Danaus fled with his daughters to Argos, sailing thither in a ship which he had built, and landing on the way at Rhodes, where he erected a statue to Athena Lindia. Arrived in Argos, he was made king of the country by the people, in consequence of an omen which seemed to the Argives to point to this choice. The sons of AEgyptus, however, followed him to his new kingdom, but professed friendly intentions, and asked and received his daughters in marriage. (See Danaides.) According to some writers, Danaus died a natural death; but according to others, he was slain by Lynceus, the only survivor of his brother's sons.