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Family name Gilberg (Gilberg , Гильберг ) , worldwide, is quite a rare cognomen. The cognomen Gilberg is habitual in Norway, where it is quite a rare surname, Israel, and Denmark, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Norway. Much less frequently, Gilberg is the forename as well as the last name.