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Cognomen Trinh (Trinh
, Trịnh
, チン
) , all over the world, is a widespread surname. The family name Trinh is habitual in Vietnam, where it is quite a common surname, Macao, and Australia, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Vietnam, the United States, and Australia. Also, Trinh is the forename as well as the last name.