Cognomen Ruhna (Ruhna 
) , in the entire world, is a very rare surname. The last name Ruhna is habitual in Malaysia, where it is a rare surname, and India, where it is an extremely rare surname. Much less frequently, Ruhna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruhna | India, United States, Malaysia, Philippines |