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Surname 朋子 (Tomoko , Taniguchi , 朋子 ) , all around the world, is quite a common cognomen. The family name 朋子 is characteristic of Fiji, where it is quite a common surname, Japan, where it is quite a rare surname, and Taiwan, where it is a rare surname. In absolute terms, the name is most common in Japan, Brazil, and the United States. More frequently, 朋子 is the forename as well as the last name.