In all the world, Руса (Руса 
, Rusa 
, Roosa 
) is a common principally girly, but scarcely male given name. The given name Руса is characteristic of Bulgaria, where it is a common female name, Finland, where it is quite a rare girly name, and Georgia, where it is quite a rare primarily feminine, but very infrequently boy's name. Measured by absolute frequency, it most frequently occurs in Bulgaria, India, and Finland. Also, Руса is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Руса | Bulgaria, Kazakhstan, Ukraine, Russia |
| Rusa | United States, Romania, India, Bangladesh, Indonesia |
| Roosa | Venezuela, United States, Finland, India, Indonesia |
| Rousa | Brazil, United States, Greece, India, Algeria |