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Cognomen Bytsko (Быцко , Bytsko , Бицко ) , globally, is a rare family name. The surname Bytsko is characteristic of Belarus, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Ukraine. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Belarus, Russia, and Ukraine. Much less frequently, Bytsko is the forename as well as the last name.