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Surname Bùi (Bui , Bùi , Буй ) , throughout the world, is a widespread cognomen. The surname Bùi is characteristic of Vietnam, where it is a common surname, Macao, and British Virgin Islands, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Vietnam, the United States, and Australia. Also, Bùi is the forename as well as the last name.