Family name Rujen (Rujen 
) , around the world, is a rare surname. The last name Rujen is characteristic of Georgia, where it is a very rare surname, Tanzania, and Indonesia. Not in comparison with a country's population, it is commonest in Tanzania, Indonesia, and India. More frequently, Rujen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rujen | Nepal, Philippines, Tanzania, India, Indonesia |