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Last name 寺原 (Terahara , 寺原) , all over the world, is a very rare surname. The family name 寺原 is characteristic of Malaysia, where it is a very rare surname, Canada, where it is an extremely rare surname, and Brazil. Not in comparison with a country's population, this name is the most popular in Malaysia, Brazil, and the United States. Very seldom, 寺原 is the forename as well as the last name.