Cognomen 蒂希 (蒂希 
, Titsch 
) , all over the world, is a rare last name. The surname 蒂希 is habitual in Germany, where it is a rare surname, the United States, where it is a very rare surname, and Canada. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and China. Very seldom, 蒂希 is the forename as well as the last name.