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Last name Bergan (伯根 , Bergan , Берган ) , worldwide, is quite a rare surname. The cognomen Bergan is habitual in Saint Kitts and Nevis, where it is quite a common surname, Norway, and Antigua and Barbuda. In absolute terms, it is commonest in the United States, Norway, and China. Likewise, Bergan is the forename as well as the last name.