Family name อิ่มใจหาญ (อิ่มใจหาญ, Tuamjaihan 
) , across the world, is an extremely rare last name. The last name อิ่มใจหาญ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tuamjaihan | Thailand |