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Family name Millier (Mille , Millier ) , all over the world, is a common last name. The surname Millier is characteristic of Western Europe, particularly France, where it is quite a common surname, Belgium, where it is quite a rare surname, and Austria. Not in comparison with a country's population, it is commonest in France, the United States, and Italy. Much less frequently, Millier is the forename as well as the last name.