Cognomen Амедео (Amadeo 
, Amedeo 
, Amedeu 
) , across the world, is a common last name. The last name Амедео is characteristic of Spain, where it is quite a common surname, Mexico, where it is quite a rare surname, and Honduras. In absolute terms, it is the most numerous in Mexico, Spain, and Argentina. More frequently, Амедео is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Amadeo | Italy, Spain, Mexico, Argentina, Peru |
| Amedeo | Italy, Spain, Philippines, Argentina, Peru |
| Amedeu | France, Spain, Brazil, South Africa |
| Амедео | Russia, Ukraine |