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Last name Uan (Uan , อวน , อ่วน) , all around the world, is quite a rare family name. The surname Uan is habitual in South-eastern Asia, particularly Malaysia, where it is quite a rare surname, Myanmar, where it is a rare surname, and Singapore. Measured by absolute frequency, it most frequently occurs in China, Malaysia, and Indonesia. Also, Uan is the forename as well as the last name.