Prejłowo was formerly part of the German Empire. In the German Empire, the place was called Preiwils.
The place is now called Prejłowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Preilowo | German Empire | Allenstein | 1914 |
| Preylowen | German Empire | Allenstein | 1938 |
| Preiwils | German Empire | Allenstein | 1939 |
| Prejłowo | Under Polish administration | Olsztyn | 1945 |
| Prejłowo | Poland | Olsztyn | 1992 |