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Surname Ум (Oum , Um , Umm ) , all over the world, is a common cognomen. The surname Ум is habitual in Cameroon, where it is quite a common surname, Morocco, and Algeria, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in India, Cameroon, and Morocco. More prevalently, Ум is the forename as well as the last name.