Family name Иероним (Hieronymus 
, Hieronim 
, Ieronim 
) , around the globe, is a common last name. The surname Иероним is characteristic of Poland, where it is quite a common surname, Germany, where it is quite a rare surname, and Romania, where it is a rare surname. In absolute terms, it is commonest in Poland, Germany, and the United States. Much less frequently, Иероним is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hieronymus | Poland, Switzerland, United States, Germany, Austria |
| Hieronim | Poland, China, France, United States, Germany |
| Ieronim | Spain, Romania, Mexico, United States, Italy |
| Иероним | Russia, Lithuania |