Surname كوسار (Kosar 
, كوسار , Cossar 
) , around the world, is a common last name. The last name كوسار is characteristic of Slovenia, where it is quite a common surname, Pakistan, where it is quite a rare surname, and Slovakia. Not in comparison with a country's population, the name is most common in Pakistan, India, and the United States. Likewise, كوسار is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kosar | Iran, India, Iraq, United States, Pakistan |
| كوسار | Iran, Iraq |
| Cossar | United Kingdom, Slovakia, United States, Democratic Republic of the Congo, Italy |