Cognomen Tschang (Чанг 
, Tschang 
) , in all the world, is a rare family name. The cognomen Tschang is characteristic of Russia, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Russia, Italy, and Kazakhstan. Also, Tschang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Чанг | Kazakhstan, Ukraine, Belarus, Russia, Armenia |
| Tschang | Italy, Canada, United States, France |