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Cognomen Tōru (Toru , 徹 , Tōru) , around the world, is quite a common family name. The cognomen Tōru is characteristic of Estonia, where it is quite a rare surname, Japan, and Turkey. Not in comparison with a country's population, this name is the most popular in Japan, China, and Bangladesh. Likewise, Tōru is the forename as well as the last name.