Family name Кальчаев (Кальчаев 
) , worldwide, is a very rare surname. The surname Кальчаев 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 |
|---|---|
| Кальчаев | Kyrgyzstan, Kazakhstan, Russia |