Family name Kaynov (Каинов 
, Кайнов 
, Kaynov 
) , in all the world, is quite a rare surname. The surname Kaynov is characteristic of Russia, where it is quite a rare surname, Belarus, where it is a rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Каинов | Kyrgyzstan, Russia, Kazakhstan, Belarus |
| Кайнов | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Kaynov | Russia, United States, Bulgaria |
| Каынов | Russia |