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Last name 桂氏 (桂氏 ) , all around the world, is an extremely rare surname. Much more frequently, 桂氏 is the forename as well as the last name.
Gui, Gye, Kay, Kie, Kje, Kuej, Kye, Kyeh, Kùi, Quế, Гуй, Ке, ケ, ゲ, 桂, and 계