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Cognomen Mroček (Mroček
, Мрочек
) , in all the world, is a very rare last name. The cognomen Mroček is characteristic of Croatia, where it is a rare surname, Belarus, and Czechia. In absolute terms, it is commonest in Eastern Europe, particularly Belarus, Czechia, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Mroček | Czechia, Croatia |
| Мрочек | Ukraine, Belarus, Russia |