Cognomen Derfa (Derfa 
) , in all the world, is a rare family name. The last name Derfa is characteristic of Italy, where it is a rare surname, Malaysia, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Much less frequently, Derfa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Derfa | Turkey, Italy, Malaysia, Nigeria, Venezuela |