Cognomen Ercílio (Ercílio 
) , worldwide, is an extremely rare family name. The cognomen Ercílio is characteristic of Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname. Predominantly, Ercílio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ercílio | Portugal, Brazil, Mozambique |