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Surname Kostecki (Kostecki , Kosteki , Костецкий ) , in the entire world, is quite a common cognomen. The last name Kostecki is habitual in Eastern Europe, particularly Poland, where it is quite a rare surname, Ukraine, and Belarus. In absolute terms, the name is most common in Eastern Europe, particularly Poland, Ukraine, and Russia. Also, Kostecki is the forename as well as the last name.