Family name Зайдов (Zaidov 
, Зайдов 
, Zaydov 
) , in all the world, is quite a rare cognomen. The surname Зайдов is characteristic of Azerbaijan, where it is quite a rare surname, Lithuania, where it is a rare surname, and Bulgaria. Not in comparison with a country's population, it is the most numerous in Azerbaijan, Russia, and Bulgaria.
| VARIANT | COUNTRY |
|---|---|
| Zaidov | Azerbaijan, Germany, Russia, Bulgaria, Lithuania |
| Зайдов | Azerbaijan, Kazakhstan, Russia, Kyrgyzstan, Ukraine |
| Zaydov | Azerbaijan, Greece |