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