Plavni was formerly part of the German Empire. In the German Empire, the place was called Plauendorf.
The place is now called Plavni and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plawischken | German Empire | Goldap | 1938 |
| Plauendorf | German Empire | Goldap | 1939 |
| Pljavišken | Under Soviet administration | Kaliningrad | 1945 |
| Plavni | Russian Federation | Ozersk | 1992 |