Cognomen Кайдаев (Кайдаев 
) , in the world, is an extremely rare last name. The cognomen Кайдаев is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname. Also, Кайдаев is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Кайдаев | Russia |