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Cognomen ツチヤ (ツチヤ , Tutiya , Tsuchiya ) , throughout the world, is quite a rare last name. The cognomen ツチヤ is habitual in Hong Kong, where it is quite a rare surname, Singapore, and Slovenia. Measured by absolute frequency, it is the most numerous in Japan, Brazil, and the United States. More prevalently, ツチヤ is the forename as well as the last name.