Family name Косманбетов (Косманбетов 
) , in all the world, is a very rare last name. The last name Косманбетов is habitual in Kazakhstan, where it is a rare surname, and Russia, where it is an extremely rare surname. Much less frequently, Косманбетов is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Косманбетов | Russia, Kazakhstan |