Worldwide, Tirja (Tirja 
) is a rare dominantly feminine, but seldom boy's forename. The given name Tirja is characteristic of Southern Asia, particularly India, where it is a very rare dominantly girly, but uncommonly male name. Very seldom, Tirja is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Tirja | Malaysia, India, Greece, Romania, Indonesia |