Cognomen Fillion-Slepoy (Fillion-Slepoy 
) , worldwide, is an extremely rare family name. The last name Fillion-Slepoy is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Fillion, and a last name Slepoy.
| VARIANT | COUNTRY |
|---|---|
| Fillion-Slepoy | United States |