In the entire world, Isernia (Isernia 
) is a very rare unisex given name. The given name Isernia is characteristic of Southern Europe, particularly Italy, where it is a very rare gender-neutral name. Much more prevalently, Isernia is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Isernia | Canada, France, Argentina, Italy, United States |