Family name Kourylev (Kourylev 
, Курылёв 
) , worldwide, is a very rare surname. The surname Kourylev is habitual in Austria, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Kourylev | Austria, Canada, Russia |
| Курылёв | Kazakhstan, Russia |