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Last name سياران (Ciaran , Ciarán , سياران ) , in all the world, is a rare surname. The family name سياران is habitual in Ireland, where it is quite a rare surname, Uruguay, where it is a rare surname, and Hungary. Measured by absolute frequency, the name is most common in Ireland, Iran, and Spain. Much more frequently, سياران is the forename as well as the last name.