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Last name Gusain (Gusain ) , in all the world, is a common cognomen. The last name Gusain is characteristic of United Arab Emirates, where it is quite a rare surname, Bahrain, and India. Not in comparison with a country's population, it is the most numerous in India, United Arab Emirates, and the United States. Much less frequently, Gusain is the forename as well as the last name.