Last name Gaiduchok (Гайдучок 
, Gaiduchok 
) , in the entire world, is a rare family name. The surname Gaiduchok is habitual in Ukraine, where it is quite a rare surname, Kazakhstan, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Гайдучок | Russia, Kazakhstan, Ukraine |
| Gaiduchok | United States, Ukraine |