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Cognomen Yuku (Yuku , 玉库 , يوكو ) , across the world, is a rare last name. The last name Yuku is characteristic of Kenya, where it is a rare surname, Sudan, and Tanzania, where it is a very rare surname. Measured by absolute frequency, the name is most common in China, Kenya, and Sudan. More frequently, Yuku is the forename as well as the last name.