Family name Усумбаев (Усумбаев 
) , globally, is a very rare last name. The cognomen Усумбаев is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Усумбаев | Kazakhstan, Russia, Kyrgyzstan |