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Cognomen Rougan (Rougan ) , worldwide, is a very rare surname. The cognomen Rougan is habitual in Morocco, where it is a rare surname, the United States, where it is an extremely rare surname, and Mexico. Not in comparison with a country's population, it is commonest in Morocco, the United States, and India. Much less frequently, Rougan is the forename as well as the last name.