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Surname Gladun (Gladun , Гладун ) , in all the world, is quite a common family name. The last name Gladun is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Moldova, where it is quite a rare surname, and Belarus. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Ukraine, Russia, and Belarus. Very seldom, Gladun is the forename as well as the last name.