Family name Круус (Круус 
, Kruus 
) , in the world, is quite a rare cognomen. The family name Круус is characteristic of Northern Europe, particularly Estonia, where it is quite a common surname, Finland, where it is quite a rare surname, and Sweden.
| VARIANT | COUNTRY |
|---|---|
| Круус | Estonia, Russia, Ukraine |
| Kruus | Norway, Estonia, United States, Sweden, Finland |
| круус, яан Estonian military personnel, RU (b. 1884) |
|
|
| круус, хейно рихардович Estonian basketball player, EE (b. 1926) |
|