Family name Kazydub (Kazydub 
, Казыдуб 
) , in all the world, is a rare last name. The surname Kazydub is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Kazydub | Russia, Ukraine |
| Казыдуб | Kyrgyzstan, Kazakhstan, Russia, Ukraine |