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Cognomen Qigai (Qigai ) , in the world, is an extremely rare surname. Much more frequently, Qigai is the forename as well as the last name.
乞丐, 其改, 其概, 其盖, 启改, 启概, 启盖, 呮絠, 奇改, 奇概, 气概, 起改, and 起概