In all the world, Thử (Thử 
) is a very rare masculine forename. The first name Thử is habitual in South-eastern Asia, particularly Vietnam, where it is a very rare masculine name. Likewise, Thử is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thử | Myanmar, Vietnam |
| lê văn thử politician (b. 1906) |
|