Surname Dematrio (Dematrio 
) , throughout the world, is a very rare cognomen. The last name Dematrio is habitual in Tanzania, where it is a very rare surname, Mexico, where it is an extremely rare surname, and Brazil. Also, Dematrio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dematrio | Italy, Philippines, Mexico, United States, Tanzania |