Groß Mrosen was formerly part of the German Empire. In the German Empire, the place was called Schönhorst (Ostpr.).
The place is now called Mrozy Wielkie and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Groß Mrosen | German Empire | Lyck | 1914 |
| Mrossen | German Empire | Lyck | 1938 |
| Schönhorst (Ostpr.) | German Empire | Lyck | 1939 |
| Mrozy Wielkie | Under Polish administration | Ełk | 1945 |
| Mrozy Wielkie | Poland | Suwałki | 1992 |