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Cognomen Grunberg (Grunberg , Грюнберг , גרונברג ) , in the entire world, is quite a rare surname. The surname Grunberg is habitual in Suriname, where it is quite a common surname, Estonia, and Iceland, where it is quite a rare surname. Measured by absolute frequency, it is commonest in France, the United States, and Romania. Much less frequently, Grunberg is the forename as well as the last name.