Surname Karastoyanov (Karastoyanov 
, Карастоянов 
) , around the world, is quite a rare family name. The last name Karastoyanov is habitual in Eastern Europe, particularly Bulgaria, where it is quite a common surname, Moldova, where it is quite a rare surname, and Ukraine, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Karastoyanov | United States, Norway, Russia, Bulgaria, Canada |
| Карастоянов | Ukraine, Kazakhstan, Moldova, Russia, Bulgaria |
| lyuben karastoyanov Bulgarian athletics competitor, BG (b. 1904) |
|