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Cognomen Huat (Huat , ハット , Хуат ) , across the world, is a widespread surname. The surname Huat is habitual in South-eastern Asia, particularly Malaysia, where it is a common surname, Singapore, where it is quite a common surname, and Brunei. Measured by absolute frequency, it is commonest in Malaysia, China, and Taiwan. Very seldom, Huat is the forename as well as the last name.