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Surname Langui (兰桂 , 兰贵 , Langui ) , worldwide, is quite a rare cognomen. The last name Langui is habitual in Gabon, where it is quite a rare surname, Ivory Coast, and France, where it is a rare surname. Measured by absolute frequency, the name is most common in China, Ivory Coast, and Gabon. More prevalently, Langui is the forename as well as the last name.