Surname Kasaev (Kasaev 
) , across the world, is a rare family name. The cognomen Kasaev is characteristic of Finland, where it is a rare surname, Norway, and Russia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Russia, Finland, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kasaev | Norway, Germany, United States, Russia, Finland |