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Cognomen קאו (Kao , Cão , קאו ) , in all the world, is a common family name. The last name קאו is characteristic of Taiwan, where it is quite a common surname, Lesotho, and Cayman Islands (explore the name in all countries). In absolute terms, the name is most common in Taiwan, the United States, and China. Very seldom, קאו is the forename as well as the last name.