Cognomen Basilus (Basilus 
) , in all the world, is an extremely rare last name. The cognomen Basilus is habitual in Georgia, where it is a very rare surname, Israel, and Malaysia, where it is an extremely rare surname. Much more frequently, Basilus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Basilus | Israel, India, Indonesia, Georgia, Malaysia |