Cognomen Хайнов (Khainov 
, Хайнов 
, Hainov 
) , globally, is a rare surname. The cognomen Хайнов is habitual in Bulgaria, where it is quite a rare surname, Russia, where it is a very rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Khainov | Russia, United States |
| Хайнов | Kazakhstan, Russia, Ukraine |
| Hainov | Bulgaria |