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Family name Brack (Brack , בראק , Брак ) , worldwide, is a common cognomen. The last name Brack is habitual in Western Europe, particularly Switzerland, where it is quite a common surname, Germany, where it is quite a rare surname, and Belgium. Measured by absolute frequency, it is commonest in Germany, the United States, and Switzerland. Much less frequently, Brack is the forename as well as the last name.