Cognomen Benjamin Amadeo (Benjamin Amadeo 
) , across the world, is an extremely rare family name. The family name Benjamin Amadeo is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. Much more prevalently, Benjamin Amadeo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Benjamin Amadeo | Costa Rica, Mexico, Chile, Ecuador, Peru |
Rojas, Lopez, Ticona, Flores, Mendoza, Hernandez, Fernandez, Rosas Castro, and Echeverria Echeverria