Last name ثر (ثر 
) , around the world, is a rare family name. The surname ثر is characteristic of Northern Africa, particularly Morocco, where it is a rare surname, Algeria, and Tunisia. Not in comparison with a country's population, this name is the most popular in Northern Africa, particularly Morocco, Algeria, and Egypt.
| VARIANT | COUNTRY |
|---|---|
| ثر | Morocco, Egypt, Tunisia, Algeria |