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Surname Chansang (Chansang , จันทร์ส่อง) , around the world, is a rare last name. The family name Chansang is characteristic of Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States. Measured by absolute frequency, the name is most common in Thailand, India, and Malaysia. Very seldom, Chansang is the forename as well as the last name.