Family name Ifj (Ifj 
) , in the world, is quite a rare surname. The cognomen Ifj is characteristic of Hungary, where it is quite a common surname, Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, Ifj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ifj | Thailand, India, Hungary |