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Cognomen Duale (Duale , دوالي ) , worldwide, is quite a common last name. The surname Duale is habitual in Djibouti, where it is quite a common surname, Somalia, and Palestinian Territory, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Sub-Saharan Africa, particularly Somalia, Kenya, and Djibouti. Very seldom, Duale is the forename as well as the last name.