Worldwide, Tatnai (Tatnai 
) is a very rare unisex first name. The first name Tatnai is habitual in Latin America and the Caribbean, particularly Mexico, where it is a very rare epicene name. Likewise, Tatnai is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Tatnai | Brazil, United States, Mexico, Spain |