Cognomen Иозеф (Yozef 
, Иозеф 
, Iozef 
) , around the world, is a very rare last name. The last name Иозеф is habitual in Bulgaria, where it is a rare surname, Switzerland, where it is a very rare surname, and Georgia. Measured by absolute frequency, it is the most numerous in Russia, Bulgaria, and Switzerland. More prevalently, Иозеф is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yozef | Democratic Republic of the Congo, Indonesia, Bulgaria, United States, India |
| Иозеф | Kazakhstan, Russia |
| Iozef | Switzerland, Russia, Georgia, United States, Brazil |