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Globally, みお (Mio , みお) is quite a rare gender-neutral forename. The first name みお is characteristic of Macao, where it is quite a common girly name, Hong Kong, where it is quite a rare gender-neutral name, and Puerto Rico, where it is quite a rare girly name. In absolute terms, it is the most numerous in Indonesia, Japan, and Italy. More frequently, みお is the last name as well as the forename.
みお is also a name for the fictitious and mythical characters: Mio Akiyama , the fictional character from K-On!; Mio Mizukoshi , the fictional character from Ryūō no Oshigoto! and Mio , the fictional character appearing in the movie « Kamataki ».