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Last name Waan (หวาน , Waan , Ваан ) , globally, is quite a common surname. The family name Waan is habitual in Armenia, where it is a common surname, Mauritius, where it is quite a rare surname, and Taiwan, where it is a rare surname. In absolute terms, it most frequently occurs in Armenia, Taiwan, and Indonesia. Much less frequently, Waan is the forename as well as the last name.