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Cognomen Bertram (Bertram , Бертрам , ברטרם ) , around the world, is a common last name. The surname Bertram is characteristic of Jersey, where it is quite a common surname, Germany, and Denmark, where it is quite a rare surname. In absolute terms, this name is the most popular in Germany, the United States, and the United Kingdom. Also, Bertram is the forename as well as the last name.