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Last name Brosch (Rossi , بروش , Brosch ) , all over the world, is a widespread surname. The last name Brosch is habitual in San Marino, where it is a widespread surname, Italy, where it is a common surname, and Monaco (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Italy, Brazil, and Argentina. Very seldom, Brosch is the forename as well as the last name.