Cognomen Kourliandskaia (Kourliandskaia 
, Курляндская 
) , around the world, is a rare family name. The cognomen Kourliandskaia is habitual in Russia, where it is a rare surname, Kazakhstan, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kourliandskaia | United States |
| Курляндская | Kazakhstan, Russia |