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Family name Phung (Phung , Phùng , フン ) , globally, is a common last name. The surname Phung is habitual in Macao, where it is quite a common surname, Vietnam, and Brunei, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Vietnam, the United States, and Malaysia. Also, Phung is the forename as well as the last name.