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Last name 古氏 (古氏 ) , around the globe, is an extremely rare cognomen. Predominantly, 古氏 is the forename as well as the last name.
Cổ, Go, Goh, Gu, Gushi, Gŭ, Khoo, Ko, Koh, Koo, Ku, Ко, コ, 古, 高, 髙, and 고