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Surname Millón (Milion , Millon , Mion ) , in the world, is a common cognomen. The last name Millón is habitual in Guernsey, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Ethiopia. Measured by absolute frequency, this name is the most popular in Ethiopia, France, and Italy. Much less frequently, Millón is the forename as well as the last name.