In the world, Illai (Illai 
) is a very rare mostly male, but uncommonly girly given name. The forename Illai is habitual in China, where it is an extremely rare male name, and India, where it is an extremely rare epicene name. Likewise, Illai is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Illai | United States, India, China, Malaysia |