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Family name Ердал (Erdal , Ердал , Yerdal ) , across the world, is a common last name. The family name Ердал is habitual in Turkey, where it is quite a common surname, Norway, and North Macedonia, where it is quite a rare surname. In absolute terms, it is commonest in Turkey, Norway, and Germany. More frequently, Ердал is the forename as well as the last name.