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 | Ukraine, Kazakhstan, Russia, United States, Kyrgyzstan |
| Umarjon | Russia, Uzbekistan, United States |