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Last name Luong (Luong , Lương , Луонг ) , across the world, is a common cognomen. The family name Luong is characteristic of Macao, where it is quite a common surname, Vietnam, and Australia, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Vietnam, the United States, and Canada. Also, Luong is the forename as well as the last name.