Around the world, Roberto Willian (Roberto Willian 
) is a very rare male given name. The first name Roberto Willian is characteristic of Latin America and the Caribbean, particularly Peru, where it is a very rare boy's name. Much less frequently, Roberto Willian is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Roberto Willian | Brazil, Costa Rica, Peru, Ecuador, Chile |