Family name Kaarus (Kaarus 
) , around the world, is a very rare last name. The family name Kaarus is habitual in Estonia, where it is quite a rare surname, Canada, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kaarus | Estonia, United States, Canada |
| eha kaarus (b. 1923) |
|