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Surname Mustaffa (Mustaffa ) , in the world, is a common family name. The last name Mustaffa is habitual in South-eastern Asia, particularly Malaysia, where it is quite a common surname, Singapore, and Brunei, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Malaysia, Singapore, and Pakistan. Much less frequently, Mustaffa is the forename as well as the last name.