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Surname Hajdas (Hajdas ) , in the world, is a rare cognomen. The cognomen Hajdas is habitual in Poland, where it is quite a rare surname, Austria, where it is a rare surname, and Czechia. Not in comparison with a country's population, it is the most numerous in Poland, the United States, and France. More prevalently, Hajdas is the forename as well as the last name.