Cognomen Rosjo (Rosjo 
) , around the globe, is a very rare surname. The cognomen Rosjo is habitual in Norway, where it is a rare surname, the United Kingdom, where it is an extremely rare surname, and Brazil. Measured by absolute frequency, it is the most numerous in Norway, India, and the United Kingdom. Very seldom, Rosjo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosjo | Norway, United Kingdom, United States, India, Brazil |