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Cognomen Στεφάνου (Stefanou , Stephanou , Στεφάνου ) , all over the world, is quite a common surname. The family name Στεφάνου is characteristic of Cyprus, where it is a common surname, Greece, where it is quite a common surname, and Australia, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Greece, Cyprus, and the United States.