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Family name Ülkü (Ülkü , Улькю ) , all around the world, is a common last name. The cognomen Ülkü is habitual in Turkey, where it is quite a common surname, Austria, where it is a rare surname, and Germany. Not in comparison with a country's population, it most frequently occurs in Turkey, Germany, and China. More prevalently, Ülkü is the forename as well as the last name.