Cognomen Rocna (Rocna 
) , across the world, is an extremely rare last name. The last name Rocna is characteristic of Peru, where it is an extremely rare surname, Brazil, and the United States. Predominantly, Rocna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rocna | Philippines, Democratic Republic of the Congo, India, United States, Brazil |