Family name Iffarth (Iffarth 
) , around the world, is a very rare last name. The family name Iffarth is characteristic of Germany, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Iffarth | Germany, United States |
|
martin iffarth German association football player, DE (b. 1957) |
|