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Family name און (On , Eun , Un ) , worldwide, is a common surname. The family name און is habitual in Macao, where it is a common surname, Brunei, and Malaysia, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, the name is most common in South-eastern Asia, particularly Malaysia, Myanmar, and Indonesia. Likewise, און is the forename as well as the last name.