Surname Tran Ngoc (Tran Ngoc 
) , all over the world, is a rare last name. The last name Tran Ngoc is habitual in Vietnam, where it is a rare surname, Netherlands, where it is a very rare surname, and France. Not in comparison with a country's population, it is commonest in Vietnam, France, and the United States. More frequently, Tran Ngoc is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tran Ngoc | Vietnam, United States, Malaysia, France, Indonesia |