Gnojna was formerly part of the German Empire. In the German Empire, the place was called Olbendorf.
The place is now called Gnojna and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Olbendorf | German Empire | Strehlen | 1939 |
| Gnojna | Under Polish administration | Strzelin | 1945 |
| Gnojna | Poland | Opole | 1992 |