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Family name กล่าว (Klao , ក្លាវ , กล่าว) , all around the world, is a very rare cognomen. The last name กล่าว is habitual in Thailand, where it is a very rare surname, Cambodia, and Colombia. In absolute terms, it is the most numerous in Thailand, Colombia, and France. More prevalently, กล่าว is the forename as well as the last name.