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Last name Douze (Douze , Douz ) , in the world, is quite a rare cognomen. The surname Douze is characteristic of Tunisia, where it is quite a common surname, Haiti, where it is quite a rare surname, and Algeria. Not in comparison with a country's population, the name is most common in Northern Africa, particularly Tunisia, Algeria, and Morocco. Much less frequently, Douze is the forename as well as the last name.