Cognomen Jadja (Jadja 
) , throughout the world, is a very rare surname. The family name Jadja is habitual in Indonesia, where it is a very rare surname, India, where it is an extremely rare surname, and the United States. Very seldom, Jadja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jadja | Indonesia, Philippines, United States, India, Brazil |