Cognomen Umedzhon (Umedzhon 
) , in all the world, is an extremely rare last name. The family name Umedzhon is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare surname. Predominantly, Umedzhon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Umedzhon | Uzbekistan, Russia, Tajikistan |