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Globally, Oui (Wi , Oui , Ouija ) is a common epicene first name. The forename Oui is characteristic of Northern Africa, particularly Tunisia, where it is quite a common gender-neutral name, Algeria, where it is quite a rare epicene name, and Morocco. Not in comparison with a country's population, this name is the most popular in Indonesia, Algeria, and Tunisia. Likewise, Oui is the last name as well as the forename.
Oui is also a name for the fictitious and mythical characters: Wi , the character in the play Nga Tangata Toa, close friend of Taneatua.