Cognomen Sergio Ernesto (Sergio Ernesto 
) , around the world, is a rare last name. The family name Sergio Ernesto is characteristic of Chile, where it is quite a rare surname, and Spain, where it is a very rare surname. More frequently, Sergio Ernesto is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sergio Ernesto | Peru, Chile, Mexico, Guatemala, Ecuador |