Io was an Argive princess and the daughter of Inachos, an ancient
hero or river god of Argos.
She also had the misfortune to be subjected to the lust of Zeus.
Zeus, in an attempt to avoid the rage and jealousy of Hera, his
wife, transformed Io into a handsome white heifer.
Upon reaching Egypt and the Nile, Io bore Zeus a son, Epaphus.