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Cognomen Janke (Janke , Yankee , Жанке ) , in all the world, is a common family name. The surname Janke is habitual in Germany, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Estonia. In absolute terms, it most frequently occurs in Germany, the United States, and Brazil. Much less frequently, Janke is the forename as well as the last name.