Cognomen ג'יה (Jia 
, Gia 
, ג'יה 
) , in all the world, is a prevalent surname. The cognomen ג'יה is characteristic of Georgia, where it is a common surname, China, where it is quite a common surname, and Malaysia (explore the name in all countries). Very seldom, ג'יה is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jia | Indonesia, Vietnam, China, India, Malaysia |
| Gia | Vietnam, China, India, Malaysia, Georgia |
| ג'יה | Israel |