Family name Rilas (Rilas 
) , all around the world, is a rare cognomen. The last name Rilas is characteristic of Algeria, where it is a rare surname, Indonesia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Also, Rilas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rilas | Indonesia, Philippines, Algeria, Brazil, India |