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Cognomen Zadworna (Zadworna ) , around the globe, is a rare family name. The cognomen Zadworna is characteristic of Poland, where it is a rare surname, the United Kingdom, where it is an extremely rare surname, and Canada. Not in comparison with a country's population, it is commonest in Poland, the United Kingdom, and the United States. More prevalently, Zadworna is the forename as well as the last name.