Family name Kasimjan (Касимжан 
, Касимян 
, Kasimjan 
) , around the globe, is a very rare surname. The family name Kasimjan is habitual in Kyrgyzstan, where it is quite a rare surname, and Russia, where it is a very rare surname. More frequently, Kasimjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Касимжан | Kazakhstan, Kyrgyzstan, Tajikistan, Azerbaijan, Russia |
| Касимян | Russia, Armenia |
| Kasimjan | United States, India |