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Cognomen Grob (Grob , גרוב , Гроб ) , all around the world, is a common last name. The last name Grob is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Netherlands, where it is quite a rare surname, and Germany. Not in comparison with a country's population, it is the most numerous in Switzerland, Germany, and the United States. Much less frequently, Grob is the forename as well as the last name.