Čaadaevo was formerly part of the German Empire. In the German Empire, the place was called Brolost.
The place is now called Čaadaevo and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Brolost | German Empire | Gerdauen | 1939 |
| Brolost | Under Soviet administration | Kaliningrad | 1945 |
| Čaadaevo | Russian Federation | Pravdinsk | 1992 |