77%RatingSave Gender Feminine Usage Greek Mythology Scripts Ἰώ(Ancient Greek) Pronounced Pron. EE-AW(Classical Greek) IE-o(English) [key·IPA] Meaning & History Meaning unknown. In Greek mythology Io was a princess loved by Zeus, who changed her into a heifer in order to hide her from Hera. A moon of Jupiter bears this name in her honour. Related Names User SubmissionIo People think this name isRate·Details classic formal upper class natural wholesome refined strange simple serious nerdy Categories animals, celestial, consorts of Zeus, cows, Discworld characters, Greek mythology, Megami Tensei characters, moons, moons of Jupiter, mythology, nature, princesses, space, uncertain etymology, Ys characters Entry updated May 29, 2020