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Surname Sijan (Sijan , Шиян , Сиян ) , around the globe, is a common cognomen. The cognomen Sijan is habitual in Serbia, where it is quite a common surname, Ukraine, and Belarus, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Ukraine, Russia, and Bangladesh. Much less frequently, Sijan is the forename as well as the last name.