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Last name Võ (Võ , Vo , Во ) , in the world, is a widespread cognomen. The surname Võ is habitual in Vietnam, where it is a common surname, Macao, where it is quite a common surname, and Australia. Measured by absolute frequency, it is the most numerous in Vietnam, the United States, and Australia. Much less frequently, Võ is the forename as well as the last name.