Family name Radayev (Радаев 
, Radayev 
) , globally, is quite a rare last name. The cognomen Radayev is habitual in Russia, where it is quite a rare surname, Kazakhstan, and Belarus, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Радаев | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Radayev | Russia, United States |