In all the world, Ronald Demetrio (Ronald Demetrio 
) is a very rare masculine given name. The first name Ronald Demetrio is characteristic of Latin America and the Caribbean, particularly Peru, where it is a very rare masculine name. Very seldom, Ronald Demetrio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ronald Demetrio | Peru, Ecuador, Chile |