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Family name Ruki (Ruki , روكي , ルキ ) , throughout the world, is quite a common cognomen. The family name Ruki is characteristic of Iran, where it is quite a rare surname, Indonesia, where it is a rare surname, and Sudan. Measured by absolute frequency, the name is most common in Indonesia, Iran, and Japan. Likewise, Ruki is the forename as well as the last name.