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Surname Janowski (Janowski , Яновский , Яновський ) , globally, is a common cognomen. The cognomen Janowski is characteristic of Antigua and Barbuda, where it is quite a common surname, Poland, and Belarus, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Poland, Russia, and Ukraine. Likewise, Janowski is the forename as well as the last name.