Gertschen was formerly part of the German Empire. In the German Empire, the place was called Gertenau.
The place is now called Jarovoe and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Gertschen | German Empire | Gumbinnen | 1938 |
| Gertenau | German Empire | Gumbinnen | 1939 |
| Gerčen | Under Soviet administration | Kaliningrad | 1945 |
| Jarovoe | Russian Federation | Gusev | 1992 |