Family name Гаджи-Касумов (Гаджи-Касумов 
) , worldwide, is an extremely rare cognomen. The cognomen Гаджи-Касумов is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname. Parts of the name also exists independently as a first name Гаджи, and a last name Касумов.
| VARIANT | COUNTRY |
|---|---|
| Гаджи-Касумов | Russia |