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All around the world, 기수 (Gisu , 기수 , Ki-Soo ) is a common masculine forename. The first name 기수 is characteristic of Japan, where it is quite a common boy's name, South Korea, where it is quite a rare masculine name, and Tanzania, where it is a very rare boy's name. Not in comparison with a country's population, this name is the most popular in Japan, South Korea, and India.