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Cognomen Bilger (Bilger , 比尔格 ) , around the globe, is quite a rare surname. The cognomen Bilger is habitual in Western Europe, particularly France, where it is quite a rare surname, Switzerland, and Germany. Not in comparison with a country's population, it is the most numerous in France, the United States, and Germany. Very seldom, Bilger is the forename as well as the last name.