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Surname Chaum (Chaum , চম, ชะอุ้ม) , all around the world, is a rare cognomen. The surname Chaum is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Myanmar, where it is a very rare surname, and Malaysia. Not in comparison with a country's population, the name is most common in Thailand, Myanmar, and the United States. Also, Chaum is the forename as well as the last name.