Surname Kostyaeva (Костяева 
, Kostyaeva 
) , in the world, is quite a rare cognomen. The last name Kostyaeva is habitual in Russia, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Czechia.
| VARIANT | COUNTRY |
|---|---|
| Костяева | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| Kostyaeva | Russia, United Kingdom, Czechia, United States, Israel |