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Cognomen Kuzniar (Kuzniar , Кузняр ) , throughout the world, is quite a rare surname. The surname Kuzniar is characteristic of Poland, where it is quite a rare surname, Czechia, where it is a rare surname, and Ireland. Not in comparison with a country's population, this name is the most popular in Poland, the United States, and Germany. More prevalently, Kuzniar is the forename as well as the last name.