Family name Rileu (Rileu 
) , across the world, is a very rare surname. The cognomen Rileu is habitual in Australia, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Much less frequently, Rileu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rileu | Brazil, United Kingdom, United States, Australia |