Cognomen Istepan (Istepan 
) , in the entire world, is a very rare surname. The cognomen Istepan is characteristic of Mexico, where it is a very rare surname, Israel, and Argentina, where it is an extremely rare surname. More frequently, Istepan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Istepan | Mexico, Argentina, United States, Turkey, India |