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Cognomen Toàn (Toan , Toàn ) , globally, is a common family name. The cognomen Toàn is habitual in Vietnam, where it is quite a common surname, Macao, where it is quite a rare surname, and Malaysia. In absolute terms, it most frequently occurs in South-eastern Asia, particularly Vietnam, Malaysia, and Indonesia. Likewise, Toàn is the forename as well as the last name.