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Cognomen Παπαπέτρου (Papapetrou , Παπαπέτρου ) , all around the world, is quite a rare family name. The cognomen Παπαπέτρου is characteristic of Cyprus, where it is a common surname, Greece, where it is quite a common surname, and Romania, where it is a rare surname. In absolute terms, it is commonest in Greece, Cyprus, and the United States.