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Surname 심 (心 , Sim , 深 , among others...) , globally, is a widespread last name. The last name 심 is characteristic of South-eastern Asia, particularly Malaysia, where it is a common surname, Singapore, and Brunei (explore the name in all countries). Measured by absolute frequency, the name is most common in China, Malaysia, and South Korea. Very seldom, 심 is the forename as well as the last name.