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Cognomen Masias (Masias , Masías ) , across the world, is quite a common last name. The last name Masias is characteristic of Peru, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Bolivia. Not in comparison with a country's population, it most frequently occurs in Peru, Mexico, and the United States. Very seldom, Masias is the forename as well as the last name.