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Family name Schack (Schack , Шак , شاك ) , in all the world, is quite a common cognomen. The family name Schack is characteristic of Denmark, where it is quite a common surname, Germany, where it is quite a rare surname, and Austria. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Denmark. Much less frequently, Schack is the forename as well as the last name.