Wielkie Zajączkowo was formerly part of the German Empire. In the German Empire, the place was called Großsanskau.
The place is now called Wielkie Zajączkowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Groß-Sanskau | German Empire | Schwetz | before the Versailles Treaty |
| Duże Zajączkowo | Poland | Świecie | after the Versailles Treaty |
| Großsanskau | German Empire | Schwetz (Weichsel) | 1939 |
| Wielkie Zajączkowo | Poland | Świecie | 1945 |
| Wielkie Zajączkowo | Poland | Bydgoszcz | 1992 |