Cognomen ใจมั่น (Chaiman 
, ใจมั่น, Jaidamrong ) , in all the world, is a rare family name. The surname ใจมั่น is characteristic of Thailand, where it is quite a rare surname, Argentina, where it is a very rare surname, and Nigeria. Much less frequently, ใจมั่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chaiman | Argentina, India, Malaysia, Thailand, Nigeria |
| Jaidamrong | Thailand |
Jaikommoon, Jaimankong, and Jaimoom