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Last name Duyong (Duyong , Duyung ) , throughout the world, is a rare family name. The family name Duyong is habitual in Malaysia, where it is a rare surname, Saudi Arabia, and Indonesia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Indonesia, Malaysia, and Philippines. Also, Duyong is the forename as well as the last name.