Surname Наджбуддин (Наджбуддин 
) , across the world, is an extremely rare family name. The cognomen Наджбуддин is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare surname. Much more prevalently, Наджбуддин is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Наджбуддин | Russia |