Surname Rilay (Rilay 
) , in the entire world, is a very rare family name. The surname Rilay is characteristic of India, where it is an extremely rare surname, Malaysia, and the United Kingdom. Much less frequently, Rilay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rilay | United Kingdom, Malaysia, United States, India, Brazil |
| henry guy rilay British general, GB (b. 1884) |
|