Last name Hillay (Hillay 
) , in the world, is a very rare cognomen. The surname Hillay is characteristic of Israel, where it is a rare surname, Germany, where it is an extremely rare surname, and Nigeria. Likewise, Hillay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hillay | Germany, United States, India, Israel, Nigeria |