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 | Kazakhstan, Russia |
| Krolov | Finland, Argentina, Estonia, Brazil |
| Krolow | Germany, United States, Argentina, Canada, Brazil |