Cognomen Hiroma (Hiroma 
) , across the world, is a rare last name. The last name Hiroma is characteristic of Japan, where it is a rare surname, Argentina, where it is an extremely rare surname, and Venezuela. Much less frequently, Hiroma is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hiroma | Japan, United States, India, Argentina, Brazil |