Surname Ilua (Ilua 
) , throughout the world, is a very rare family name. The surname Ilua is habitual in Spain, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. More prevalently, Ilua is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilua | Spain, Belarus, India, Nigeria, Russia |