Cognomen Kirdun (Kirdun 
, Кирдун 
) , all over the world, is a rare last name. The last name Kirdun is characteristic of Belarus, where it is quite a rare surname, Russia, where it is a very rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Kirdun | Russia, United States, Belarus |
| Кирдун | Russia, Ukraine, Kazakhstan, Belarus |