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In the entire world, 庾 (유 , 庾 , Yǔ ) is a rare dominantly masculine, but seldom feminine first name. The forename 庾 is habitual in Eastern Asia, particularly South Korea, where it is a rare boy's name, and China, where it is a very rare gender-neutral name. Much more prevalently, 庾 is the last name as well as the forename.
庾 is also a name for the fictitious and mythical characters: .