Tilsenau was formerly part of the German Empire. In the German Empire, the place was called Tilsenau.
The place is now called Gudkovo and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jonienen | German Empire | Tilsit-Ragnit | 1938 |
| Tilsenau | German Empire | Tilsit-Ragnit | 1939 |
| Ioninen | Under Soviet administration | Kaliningrad | 1945 |
| Gudkovo | Russian Federation | Neman | 1992 |