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Family name Zad (زاد , Zad ) , all over the world, is a common last name. The cognomen Zad is habitual in Algeria, where it is quite a common surname, Oman, where it is quite a rare surname, and Egypt. Not in comparison with a country's population, it is the most numerous in Egypt, Algeria, and India. Very seldom, Zad is the forename as well as the last name.