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Surname 葉子 (Yoko , 葉子 , Yōko) , around the globe, is a common cognomen. The family name 葉子 is habitual in Sub-Saharan Africa, particularly Gabon, where it is quite a rare surname, Liberia, and the Democratic Republic of the Congo. Measured by absolute frequency, this name is the most popular in Indonesia, the Democratic Republic of the Congo, and Japan. Also, 葉子 is the forename as well as the last name.