Janiszewek was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Janiszewek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Janiszewek | Russian Empire | Vloclavek | 1914 |
| Janiszewek | Poland | Włocławek | 1921 |
| NN | German Empire | Leslau | 1939 |
| Janiszewek | Poland | Włocławek | 1945 |
| Janiszewek | Poland | Włocławek | 1992 |