Cognomen Иончева (Иончева 
, Ioncheva 
, Iontcheva 
) , in all the world, is a rare family name. The surname Иончева is habitual in Bulgaria, where it is a rare surname, Austria, and Greece. Measured by absolute frequency, it is commonest in Bulgaria, Austria, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Иончева | Kazakhstan, Russia |
| Ioncheva | Bulgaria, United States |
| Iontcheva | Bulgaria, Canada, Greece, United States, Austria |