Cognomen Roos-Kotro (Roos-Kotro 
) , globally, is an extremely rare surname. The cognomen Roos-Kotro is characteristic of Northern Europe, particularly Finland, where it is a very rare surname. Parts of the name also exists independently as a last name Roos, and a last name Kotro.
| VARIANT | COUNTRY |
|---|---|
| Roos-Kotro | Finland |