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Last name Boros (Boros , Борош , Борос ) , across the world, is a common cognomen. The cognomen Boros is characteristic of Eastern Europe, particularly Hungary, where it is a common surname, Romania, where it is quite a common surname, and Slovakia. Not in comparison with a country's population, it is commonest in Hungary, Romania, and the United States. Very seldom, Boros is the forename as well as the last name.