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Surname Biau (Bea , Biau ) , around the world, is a common family name. The surname Biau is habitual in Equatorial Guinea, where it is quite a common surname, Cameroon, where it is quite a rare surname, and Fiji. Measured by absolute frequency, it is the most numerous in Philippines, Cameroon, and France. Also, Biau is the forename as well as the last name.