Cognomen Guerilus (Guerilus 
) , all around the world, is a very rare last name. The last name Guerilus is characteristic of Venezuela, where it is a very rare surname, France, and Canada. Not in comparison with a country's population, it is commonest in the United States, France, and Venezuela. Much less frequently, Guerilus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guerilus | Canada, France, Venezuela, Brazil, United States |