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Last name Zigu (子谷 , Zigu
, 子固
) , in all the world, is a rare cognomen. The cognomen Zigu is habitual in Israel, where it is a rare surname, Greece, where it is a very rare surname, and China, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in China, Israel, and India. More frequently, Zigu is the forename as well as the last name.