In the world, Rillu (Rillu 
) is a very rare primarily male, but scarcely feminine given name. The forename Rillu is characteristic of Southern Asia, particularly India, where it is an extremely rare predominantly male, but very seldom feminine name. Very seldom, Rillu is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rillu | India, Brazil |