Cognomen Кролов (Кролов 
, Krolov 
, Krolow 
) , all around the world, is quite a rare last name. The last name Кролов is characteristic of Estonia, where it is quite a common surname, Brazil, where it is a rare surname, and Finland. In absolute terms, it most frequently occurs in Brazil, Germany, and Estonia.
| VARIANT | COUNTRY |
|---|---|
| Кролов | Russia, Kazakhstan |
| Krolov | Brazil, Estonia, Finland, Argentina |
| Krolow | Brazil, Argentina, Canada, United States, Germany |