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Cognomen Sern (Sern ) , worldwide, is quite a common family name. The cognomen Sern is habitual in South-eastern Asia, particularly Malaysia, where it is quite a common surname, Laos, where it is quite a rare surname, and Singapore, where it is a rare surname. Not in comparison with a country's population, the name is most common in Malaysia, Taiwan, and China. Much less frequently, Sern is the forename as well as the last name.