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Last name Heidrich (Heidrich , Hydrick ) , worldwide, is a common cognomen. The cognomen Heidrich is habitual in Germany, where it is quite a common surname, Austria, where it is quite a rare surname, and Mauritius. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, Heidrich is the forename as well as the last name.