Last name Grizun (Grizun 
, Гризун 
) , in all the world, is a rare family name. The last name Grizun is habitual in Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Croatia.
| VARIANT | COUNTRY |
|---|---|
| Grizun | Croatia, Ukraine |
| Гризун | Russia, Ukraine |