Olschewen was formerly part of the German Empire. In the German Empire, the place was called Kronfelde.
The place is now called Olszewo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Olschewen | German Empire | Johannisburg | 1938 |
| Kronfelde | German Empire | Johannisburg | 1939 |
| Olszewo | Under Polish administration | Pisz | 1945 |
| Olszewo | Poland | Suwałki | 1992 |