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Family name 吉永 (Yoshinaga , Jiyong , 吉永 ) , in the entire world, is quite a common last name. The surname 吉永 is characteristic of South Korea, where it is quite a rare surname, Taiwan, where it is a rare surname, and Malaysia. In absolute terms, the name is most common in South Korea, China, and Brazil. More frequently, 吉永 is the forename as well as the last name.