Surname Ilacia (Ilacia 
) , globally, is a very rare cognomen. The last name Ilacia is characteristic of Honduras, where it is a very rare surname, Nicaragua, and Nigeria, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Nigeria, Honduras, and Mexico. Also, Ilacia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilacia | Mexico, Brazil, Honduras, Peru, Nigeria |