Surname Kosoun (Kosoun 
, Косун 
) , worldwide, is a rare last name. The family name Kosoun is characteristic of Eastern Europe, particularly Ukraine, where it is a rare surname, and Russia, where it is a very rare surname. Much less frequently, Kosoun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kosoun | Nigeria |
| Косун | Russia, Ukraine |