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Surname Siddig (صديق , Siddig , Сидиг ) , throughout the world, is a widespread last name. The last name Siddig is habitual in Sudan, where it is a common surname, Egypt, where it is quite a common surname, and Saudi Arabia (explore the name in all countries). In absolute terms, this name is the most popular in Sudan, Egypt, and Iran. Likewise, Siddig is the forename as well as the last name.