Cognomen Thi Thanh (Thi Thanh 
) , around the world, is a rare surname. The family name Thi Thanh is characteristic of Vietnam, where it is a rare surname, Spain, where it is an extremely rare surname, and Canada. More frequently, Thi Thanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thi Thanh | Australia, Malaysia, Vietnam, France, Canada |