Cognomen Ионатан (Ionatan 
, Ионатан 
) , in the world, is a very rare surname. The cognomen Ионатан is habitual in Romania, where it is a rare surname, Mexico, where it is a very rare surname, and Spain. More frequently, Ионатан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ionatan | Romania, Mexico, Bulgaria, United States, Brazil |
| Ионатан | Kazakhstan, Russia |