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Last name Chudak (Chudak , Чудак ) , all around the world, is quite a rare family name. The family name Chudak is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Poland. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Ukraine, Poland, and Russia. Much less frequently, Chudak is the forename as well as the last name.