NN was formerly part of the German Empire. In the German Empire, the place was called Seehügel.
The place is now called NN and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Eszergallen | German Empire | Angerapp | 1914 |
| Eschergallen | German Empire | Angerapp | 1936 |
| Seehügel | German Empire | Angerapp | 1939 |
| Èšergallen | Under Soviet administration | Kaliningrad | 1945 |
| NN | Russian Federation | Ozersk | 1992 |