Family name Каюмжан (Каюмжан 
) , globally, is a very rare last name. The family name Каюмжан is characteristic of Central Asia, particularly Kyrgyzstan, where it is a rare surname. Predominantly, Каюмжан is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Каюмжан | Azerbaijan, Uzbekistan, Russia, Kyrgyzstan, Tajikistan |