Throughout the world, Santiago Eugenio (Santiago Eugenio 
) is a rare masculine forename. The first name Santiago Eugenio is habitual in Chile, where it is a rare masculine name, Peru, and Spain, where it is a very rare male name. Much less frequently, Santiago Eugenio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Santiago Eugenio | Costa Rica, Spain, Ecuador, Chile, Peru |