Last name Костубаева (Костубаева 
) , globally, is a very rare surname. The cognomen Костубаева is habitual in Kazakhstan, where it is a rare surname, and Russia, where it is an extremely rare surname. Very seldom, Костубаева is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Костубаева | Kazakhstan, Russia |