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Cognomen Protasio (Protasio , Protásio ) , all around the world, is quite a rare surname. The cognomen Protasio is characteristic of Portugal, where it is quite a rare surname, Uruguay, and Brazil, where it is a rare surname. Not in comparison with a country's population, the name is most common in Brazil, Portugal, and Mexico. Likewise, Protasio is the forename as well as the last name.