Cognomen Jjam (Jjam 
) , throughout the world, is a rare family name. The cognomen Jjam is habitual in Southern Asia, particularly Pakistan, where it is a rare surname, and India, where it is an extremely rare surname. Much less frequently, Jjam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jjam | Philippines, Pakistan, United States, India, Netherlands |