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Surname Tuang (Tuang , ตวง ) , across the world, is a common cognomen. The last name Tuang is characteristic of South-eastern Asia, particularly Myanmar, where it is quite a common surname, Malaysia, and Singapore, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in South-eastern Asia, particularly Myanmar, Malaysia, and Philippines. Much less frequently, Tuang is the forename as well as the last name.