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Family name Kadioglu (Kadıoğlu , Kadioglu , Кадиоглу ) , in the world, is quite a rare last name. The family name Kadioglu is habitual in Turkey, where it is quite a rare surname, Germany, where it is a rare surname, and Austria. Not in comparison with a country's population, it is commonest in Turkey, Germany, and the United States.