Throughout the world, Sebastian Alejandro (Sebastian Alejandro 
) is a common boy's given name. The forename Sebastian Alejandro is habitual in Latin America and the Caribbean, particularly Chile, where it is quite a common masculine name, Uruguay, where it is a rare masculine name, and Costa Rica. In absolute terms, the name is most common in Chile, Argentina, and Spain. Much less frequently, Sebastian Alejandro is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sebastian Alejandro | Peru, Argentina, Spain, Chile, Ecuador |