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Family name 함 (Ham , 咸 , Hahm ) , in all the world, is a widespread surname. The last name 함 is habitual in South Korea, where it is quite a common surname, Netherlands, and Algeria (explore the name in all countries). In absolute terms, the name is most common in China, South Korea, and the United States. Much less frequently, 함 is the forename as well as the last name.