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Family name Trapp (تراب , Trapp , Trappe ) , in the world, is a common surname. The family name Trapp is habitual in Belize, where it is quite a common surname, Germany, and Hungary, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Brazil. Much less frequently, Trapp is the forename as well as the last name.