NN was formerly part of the German Empire. In the German Empire, the place was called Birkenhain, Fh..
The place is now called NN and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Leippa, Vw. | German Empire | Rothenburg (Ob. Lausitz) | 1914 |
| Birkenhain, Fh. | German Empire | Rothenburg (Ob. Lausitz) | 1939 |
| NN | Under Polish administration | Żary | 1945 |
| NN | Poland | Zielona Góra | 1992 |