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Cognomen Ounis (Ounis ) , across the world, is quite a rare family name. The surname Ounis is habitual in Northern Africa, particularly Tunisia, where it is quite a common surname, Algeria, where it is quite a rare surname, and Libya, where it is a rare surname. Measured by absolute frequency, the name is most common in Algeria, Tunisia, and France. Very seldom, Ounis is the forename as well as the last name.