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Surname דיאב (Diab , Diyab , דיאב ) , globally, is a widespread family name. The cognomen דיאב is characteristic of Lebanon, where it is a common surname, Egypt, where it is quite a common surname, and Israel (explore the name in all countries). Not in comparison with a country's population, it is commonest in Egypt, Lebanon, and Syria. Very seldom, דיאב is the forename as well as the last name.