Polyxo, in Greek mythology, is a naiad of the river Nile, presumably one of the daughters of the river-god Nilus. She was one of the wives of Danaus and bore him twelve daughters: Autonoe, Theano, Electra, Cleopatra, Eurydice, Glaucippe, Anthelea, Cleodora, Euippe, Erato, Stygne, and Bryce. They married twelve sons of Aegyptus and Caliadne, Polyxo's sister,[1] and murdered them on their wedding nights.


