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Cognomen Gwang (Gwang , กวาง , グァン) , all around the world, is a rare family name. The family name Gwang is habitual in Sudan, where it is a rare surname, Malaysia, and Hungary, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Sudan, Nigeria, and Indonesia. More frequently, Gwang is the forename as well as the last name.