Cognomen Guerin-Portis (Guerin-Portis 
) , globally, is an extremely rare last name. The last name Guerin-Portis is characteristic of Western Europe, particularly France, where it is an extremely rare surname. Parts of the name also exists independently as a last name Guerin, and a last name Portis.
| VARIANT | COUNTRY |
|---|---|
| Guerin-Portis | France |