Family name Умаржон (Умаржон 
, Umarjon 
) , globally, is a rare last name. The surname Умаржон is characteristic of Kyrgyzstan, where it is quite a rare surname, and Russia, where it is an extremely rare surname. More prevalently, Умаржон is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Умаржон | Kazakhstan, Russia, Kyrgyzstan, United States, Ukraine |
| Umarjon | Uzbekistan, Russia, United States |