Worldwide, Sebastian Hernan (Sebastian Hernan 
) is a rare boy's forename. The first name Sebastian Hernan is characteristic of Latin America and the Caribbean, particularly Chile, where it is quite a rare masculine name, and Argentina, where it is a very rare masculine name. Much less frequently, Sebastian Hernan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sebastian Hernan | Spain, Argentina, Peru, Ecuador, Chile |