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Cognomen גרשום (Gershom , גרשום ) , around the world, is quite a rare last name. The cognomen גרשום is habitual in Zambia, where it is quite a rare surname, Israel, and Uganda, where it is a rare surname. In absolute terms, it is the most numerous in Sub-Saharan Africa, particularly Uganda, Nigeria, and Zambia. More frequently, גרשום is the forename as well as the last name.