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Last name Kuwan (Kuwan , ขวัญข้าว) , around the globe, is quite a rare family name. The cognomen Kuwan is characteristic of Cameroon, where it is a rare surname, Germany, and Singapore. Not in comparison with a country's population, it most frequently occurs in China, Cameroon, and Germany. Much less frequently, Kuwan is the forename as well as the last name.