Last name นัจมุดดิน (Najmuddin 
, Najmudin , นัจมุดดิน 
) , around the world, is quite a common family name. The cognomen นัจมุดดิน is characteristic of Malaysia, where it is quite a rare surname, United Arab Emirates, and Bahrain. Not in comparison with a country's population, it is commonest in Indonesia, Malaysia, and India. Likewise, นัจมุดดิน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Najmuddin, Najmudin | Indonesia, Kenya, India, Afghanistan, Malaysia |
| นัจมุดดิน | Thailand |