Ostaševo was formerly part of the German Empire. In the German Empire, the place was called Großossen.
The place is now called Ostaševo and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Groß Oschkinnen | German Empire | Tilsit-Ragnit | 1938 |
| Großossen | German Empire | Tilsit-Ragnit | 1939 |
| Gross Oškinnen | Under Soviet administration | Kaliningrad | 1945 |
| Ostaševo | Russian Federation | Neman | 1992 |