Cognomen Kostinskiy (Kostinskiy 
, Костинский 
) , across the world, is a rare surname. The surname Kostinskiy is characteristic of Russia, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Kostinskiy | United States, Ukraine |
| Костинский | Russia, Kazakhstan, Ukraine |