Cognomen Gerlus (Gerlus 
) , in all the world, is a very rare surname. The cognomen Gerlus is characteristic of Canada, where it is a very rare surname, the United States, where it is an extremely rare surname, and France. Very seldom, Gerlus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerlus | France, Brazil, Canada, United States |