Cognomen Rourn (Rourn 
) , all over the world, is an extremely rare last name. The cognomen Rourn is habitual in Cambodia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Rourn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rourn | United States, Cambodia |