Rumunki Bedzen was formerly part of the German Empire. In the German Empire, the place was called Bensen.
The place is now called Rumunki Będzeń and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rumunki Bedzen | Russian Empire | Lipno | 1914 |
| Rumunki Będzeń | Poland | Lipno | after the Versailles Treaty |
| Bensen | German Empire | Leipe (Westpr.) | 1939 |
| Będzeń | Poland | Lipno | 1945 |
| Rumunki Będzień | Poland | Lipno | 1945 |
| Rumunki Będzeń | Poland | Włocławek | 1992 |