Cognomen Ryszczuk (Ryszczuk 
) , in the world, is a rare family name. The last name Ryszczuk is characteristic of Poland, where it is a rare surname, and Argentina, where it is an extremely rare surname. More prevalently, Ryszczuk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ryszczuk | Poland, Argentina |