Cognomen ثلج (ثلج 
) , across the world, is quite a rare surname. The family name ثلج is habitual in Syria, where it is quite a rare surname, Iraq, and Libya. Measured by absolute frequency, it is commonest in Iraq, Syria, and Sudan. Likewise, ثلج is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ثلج | Syria, Saudi Arabia, Iraq, Sudan, Egypt |