Dedave was formerly part of the German Empire. In the German Empire, the place was called Deimehöh.
The place is now called Izobilˈnoe and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Dedawe | German Empire | Labiau | 1938 |
| Deimehöh | German Empire | Labiau | 1939 |
| Dedave | Under Soviet administration | Kaliningrad | 1945 |
| Izobilˈnoe | Russian Federation | Polessk | 1992 |