Cognomen Gretzki (Gretzki 
) , in all the world, is a rare family name. The cognomen Gretzki is habitual in Slovenia, where it is a rare surname, Germany, and Venezuela, where it is an extremely rare surname. Much less frequently, Gretzki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gretzki | Germany, Slovenia, Venezuela |