Cognomen Fermus (Fermus 
) , worldwide, is a very rare surname. The surname Fermus is characteristic of France, where it is a very rare surname, Italy, and Nigeria, where it is an extremely rare surname. Very seldom, Fermus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fermus | Turkey, Italy, Nigeria, France, Brazil |