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Family name Rosenberg (Rosenberg , Розенберг , רוזנברג ) , around the world, is a common cognomen. The cognomen Rosenberg is characteristic of Guernsey, where it is a common surname, Israel, and Greenland, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it is commonest in the United States, Israel, and Germany. Much less frequently, Rosenberg is the forename as well as the last name.