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Surname دن (Den , Dinh , Dun ) , throughout the world, is a widespread cognomen. The surname دن is habitual in Vanuatu, where it is quite a common surname, Vietnam, and Macao (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Vietnam, China, and the United States. Also, دن is the forename as well as the last name.