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Cognomen Rudnicki (Rudnicki , Rudnički , רודניצקי ) , in the entire world, is a common surname. The surname Rudnicki is characteristic of Poland, where it is quite a common surname, Ukraine, where it is quite a rare surname, and Israel. Not in comparison with a country's population, this name is the most popular in Poland, Ukraine, and the United States. Also, Rudnicki is the forename as well as the last name.