Surname Rouja (Ружа 
, Rouja 
) , in the entire world, is quite a rare family name. The cognomen Rouja is characteristic of Bulgaria, where it is quite a common surname, Bermuda, where it is quite a rare surname, and Tunisia. Not in comparison with a country's population, it most frequently occurs in Bulgaria, France, and Tunisia. Likewise, Rouja is the forename as well as the last name.