NN was formerly part of the German Empire. In the German Empire, the place was called Lentzberg.
The place is now called Niewiadom and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Lentzberg) | German Empire | Rybnik | before the Versailles Treaty |
| NN | Poland | Rybnik | after the Versailles Treaty |
| Lentzberg | German Empire | Rybnik | 1939 |
| Niewiadom | Poland | Rybnik | 1945 |
| Niewiadom | Poland | Katowice | 1992 |