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Cognomen Casso (Casso , Cassus , Capsus) , around the globe, is quite a rare surname. The last name Casso is habitual in Latin America and the Caribbean, particularly the Dominican Republic, where it is quite a rare surname, Bolivia, and Colombia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Mexico, and Colombia. Very seldom, Casso is the forename as well as the last name.