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Cognomen Tsau (Ciao , Tsau ) , around the globe, is quite a rare last name. The surname Tsau is habitual in Southern Europe, particularly Italy, where it is quite a rare surname, Albania, and North Macedonia, where it is a rare surname. In absolute terms, it is the most numerous in Italy, the United States, and Malaysia. Likewise, Tsau is the forename as well as the last name.