Family name เจ็ม (Chem 
, เจ็ม 
) , all over the world, is quite a common cognomen. The last name เจ็ม is characteristic of Algeria, where it is quite a rare surname, Tunisia, and Malaysia. Not in comparison with a country's population, it is the most numerous in Algeria, Indonesia, and Tunisia. Likewise, เจ็ม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chem | Egypt, Tunisia, India, Indonesia, Algeria |
| เจ็ม | Thailand |