Cognomen كوسر (كوسر 
, Couser 
) , across the world, is quite a rare last name. The last name كوسر is characteristic of Jersey, where it is quite a common surname, the United Kingdom, where it is a rare surname, and the United States. Very seldom, كوسر is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| كوسر | Syria, Sudan, Jordan |
| Couser | Jersey, Israel, France, United States, United Kingdom |