Quick answer
Io is a girl name.
Pronunciation: Classical Greek /iː.ɔ̌ː/; English /ˈaɪ.oʊ/.
Meaning and 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.
Notes and context
Usage: greek mythology | Ancient Greek: Ἰώ