Family name Gerio (Gerio 
) , all around the world, is a rare surname. The cognomen Gerio is characteristic of Philippines, where it is a rare surname, Italy, where it is a very rare surname, and Nicaragua. In absolute terms, this name is the most popular in Philippines, Italy, and the United States. Likewise, Gerio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerio | Tanzania, Philippines, Italy, Brazil, United States |
| battista di gerio Italian painter (1350-1420), IT (b. 1350) |
|
|
| enzo gerio Italian actor, IT |
|