Cognomen Kaloianov (Kaloianov 
) , in the world, is a very rare surname. The surname Kaloianov is characteristic of Bulgaria, where it is a rare surname, South Africa, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kaloianov | Bulgaria, United States, South Africa |
| radostin kaloianov (b. 1967) |
|