Regelnitzen was formerly part of the German Empire. In the German Empire, the place was called Regelnhof.
The place is now called Regielnica and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Regelnitzen | German Empire | Lyck | 1938 |
| Regelnhof | German Empire | Lyck | 1939 |
| Regielnica | Under Polish administration | Ełk | 1945 |
| Regielnica | Poland | Suwałki | 1992 |