Family name Rosnia (Rosnia 
) , around the globe, is a rare surname. The cognomen Rosnia is characteristic of Indonesia, where it is a rare surname, Israel, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Also, Rosnia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosnia | Philippines, Malaysia, India, Indonesia, South Africa |