Surname Derfin (Derfin 
) , throughout the world, is an extremely rare cognomen. The last name Derfin is characteristic of Western Europe, particularly Germany, where it is an extremely rare surname. Much more frequently, Derfin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Derfin | Germany, Indonesia, Philippines, India, Democratic Republic of the Congo |