Family name بلج (Balj 
, بلج 
) , in the world, is a rare cognomen. The last name بلج is characteristic of Serbia, where it is quite a rare surname, Romania, where it is a rare surname, and Malaysia. Much less frequently, بلج is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Balj | Romania, Hungary, Netherlands, Serbia, Malaysia |
| بلج | Iran |