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Surname Zadecki (Zadecki
) , worldwide, is a rare last name. The cognomen Zadecki is habitual in Poland, where it is a rare surname, Croatia, and Czechia. Not in comparison with a country's population, it is the most numerous in Poland, Czechia, and the United States. More prevalently, Zadecki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Zadecki | Canada, Czechia, Poland, United States, Croatia |