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Globally, Ón (On , Ón ) is a common epicene forename. The forename Ón is habitual in Hong Kong, where it is quite a common mostly boy's, but seldom feminine name, Israel, where it is quite a common predominantly male, but scarcely feminine name, and Macao, where it is quite a common masculine name. Measured by absolute frequency, it is the most numerous in Hong Kong, Egypt, and Israel. Also, Ón is the last name as well as the forename.
Ón is also a name for the fictitious and mythical characters: Liu An , the fictional person from Romance of the Three Kingdoms; On , the human biblical character, Book of Numbers and On Shore , the musical character in the musical Titanic by Maury Yeston.