Family name Rilien (Rilien 
) , all over the world, is an extremely rare cognomen. The cognomen Rilien is habitual in South-eastern Asia, particularly Philippines, where it is an extremely rare surname. Much more prevalently, Rilien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rilien | South Africa, Philippines, United States, Democratic Republic of the Congo |