Surname Demio (Demio 
) , all over the world, is a rare cognomen. The last name Demio is characteristic of the United States, where it is a very rare surname, Italy, and Brazil. Also, Demio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demio | Italy, Philippines, United States, Myanmar, Brazil |
| giovanni demio Italian painter, IT (b. 1500) |
|