Family name Eillian (Eillian 
) , in the world, is an extremely rare last name. The surname Eillian is characteristic of Latin America and the Caribbean, particularly Venezuela, where it is an extremely rare surname, and Brazil. More frequently, Eillian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eillian | Brazil, Malaysia, United States, United Kingdom, Venezuela |