Cognomen Dulcinio (Dulcinio 
) , globally, is a very rare last name. The family name Dulcinio is habitual in Spain, where it is a very rare surname, Argentina, and Venezuela, where it is an extremely rare surname. More prevalently, Dulcinio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dulcinio | Brazil, Portugal, Spain, France, Argentina |