Globally, Phan Thi Thu (Phan Thi Thu 
) is a very rare epicene forename. The given name Phan Thi Thu is characteristic of South-eastern Asia, particularly Vietnam, where it is a very rare gender-neutral name. Likewise, Phan Thi Thu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Phan Thi Thu | Vietnam |