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Cognomen Theis (Theis , 太斯 , 泰斯 ) , all over the world, is a common surname. The last name Theis is characteristic of Luxembourg, where it is quite a common surname, Germany, and the United States, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Brazil. Much less frequently, Theis is the forename as well as the last name.