Last name Карайев (Qarayev 
, Карайев 
, Karayev 
) , in all the world, is a common surname. The cognomen Карайев is characteristic of Azerbaijan, where it is a common surname, Turkmenistan, where it is quite a rare surname, and Estonia. Not in comparison with a country's population, it is the most numerous in Azerbaijan, Turkmenistan, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Qarayev | Azerbaijan, Turkey, Russia, Georgia, United States |
| Карайев | Ukraine |
| Karayev | Azerbaijan, Russia, Turkmenistan, United States, Israel |
| Karajev | Azerbaijan, Finland, Estonia, Germany |