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Surname เทา (Thao , Tauk , เทา ) , in all the world, is a common family name. The cognomen เทา is characteristic of Macao, where it is quite a common surname, Vietnam, and Laos (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in Vietnam, the United States, and Malaysia. Also, เทา is the forename as well as the last name.