Cognomen Khaidaev (Khaidaev 
, Хайдаев 
) , around the globe, is a very rare family name. The cognomen Khaidaev is characteristic of Kazakhstan, where it is a very rare surname, and Russia. Very seldom, Khaidaev is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khaidaev | Russia, Belgium |
| Хайдаев | Russia, Kazakhstan |