Swainen was formerly part of the German Empire. In the German Empire, the place was called Swainen.
The place is now called Sadovoe and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Swainen | German Empire | Insterburg | 1939 |
| Svajnen | Under Soviet administration | Kaliningrad | 1945 |
| Sadovoe | Russian Federation | Slavsk | 1992 |