Cognomen Ryzhkovich (Рыжкович 
, Ryzhkovich ) , around the globe, is a rare family name. The cognomen Ryzhkovich is characteristic of Belarus, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Рыжкович | Kazakhstan, Russia, Belarus |
| Ryzhkovich | Russia, Belarus |