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Last name Chhom (ชม , Chhom ) , all around the world, is a rare cognomen. The surname Chhom is characteristic of Cambodia, where it is a rare surname, France, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in the United States, France, and Cambodia. More prevalently, Chhom is the forename as well as the last name.