Cognomen Delnicki (Delnicki 
) , in the world, is a very rare last name. The cognomen Delnicki is habitual in Poland, where it is a very rare surname, the United States, and Israel. Also, Delnicki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delnicki | Poland, Israel, United States |
| tom delnicki American politician, US (b. 1956) |
|