Surname Casmia (Casmia 
) , across the world, is a rare family name. The last name Casmia is characteristic of Nigeria, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Likewise, Casmia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casmia | Philippines, United Kingdom, Nigeria, South Africa |