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Cognomen Grohs (Grohs , 格罗斯 ) , around the globe, is quite a rare last name. The family name Grohs is characteristic of Aland Islands, where it is quite a common surname, Austria, where it is quite a rare surname, and Germany. In absolute terms, it is the most numerous in Germany, the United States, and Brazil. Very seldom, Grohs is the forename as well as the last name.