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Cognomen مستور (مستور , Mastur , Mastour ) , worldwide, is a common family name. The cognomen مستور is characteristic of Northern Africa, particularly Sudan, where it is quite a common surname, Morocco, where it is quite a rare surname, and Tunisia. Measured by absolute frequency, it most frequently occurs in Sudan, Indonesia, and Morocco. Also, مستور is the forename as well as the last name.