Surname Джанг (Jang 
, Djang 
, Dzhang 
) , in all the world, is a common cognomen. The cognomen Джанг is characteristic of Luxembourg, where it is quite a rare surname, Malaysia, and Fiji. Measured by absolute frequency, it is commonest in India, the United States, and Indonesia. More frequently, Джанг is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jang | China, South Korea, United States, India, Pakistan |
| Djang | China, Indonesia, Malaysia, United States, Canada |
| Dzhang | Kazakhstan, Bulgaria |
| Джанг | Kyrgyzstan, Kazakhstan, Russia, Ukraine |