Family name Крейна (Kreina 
, Крейна 
, Kreyna ) , across the world, is a very rare cognomen. The surname Крейна is habitual in Israel, where it is a rare surname, Georgia, where it is a very rare surname, and Ukraine. More prevalently, Крейна is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kreina | Brazil, Georgia, United States, Argentina, Israel |
| Крейна | Kazakhstan, Russia, Ukraine |
| Kreyna | Brazil, United States |