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Cognomen Mansum (Mas , Maso , Mansum ) , in the entire world, is a widespread surname. The family name Mansum is characteristic of Reunion, where it is quite a common surname, Monaco, and Brunei (explore the name in all countries). Measured by absolute frequency, the name is most common in Indonesia, Spain, and France. Also, Mansum is the forename as well as the last name.