Last name Косен (Косен 
) , worldwide, is an extremely rare cognomen. The surname Косен is habitual in Kyrgyzstan, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and Russia. Likewise, Косен is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Косен | Kyrgyzstan, Kazakhstan, Russia, Ukraine |