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Cognomen 雅子 (Masako , 雅子 ) , in the entire world, is quite a rare family name. The last name 雅子 is habitual in Taiwan, where it is quite a rare surname, Japan, where it is a rare surname, and South Africa. Not in comparison with a country's population, it is the most numerous in Eastern Asia, particularly Japan, Taiwan, and China. Much more frequently, 雅子 is the forename as well as the last name.