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 | Russia, Kazakhstan |
| Ioncheva | United States, Bulgaria |
| Iontcheva | Bulgaria, Greece, Canada, United States, Austria |