>
Around the globe, イオ (Eo , イオ ) is quite a rare epicene first name. The forename イオ is habitual in South Korea, where it is quite a rare girly name, Czechia, where it is a rare male name, and China, where it is a rare predominantly male, but scarcely girly name. Not in comparison with a country's population, it is the most numerous in China, South Korea, and Indonesia. Likewise, イオ is the last name as well as the forename.
イオ is also a name for the fictitious and mythical characters: Eo , the operatic character in the opera Klothó – Thread of the Tales.