Family name Ионан (Ionan 
, Ионан 
) , in all the world, is a very rare surname. The last name Ионан is characteristic of Russia, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and the United States. More prevalently, Ионан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ionan | Romania, Spain, United States, Ukraine, Brazil |
| Ионан | Russia |