Piergozy was formerly part of the German Empire. In the German Empire, the place was called Perguschen.
The place is now called Piergozy and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Perguschen | German Empire | Preußisch Eylau | 1939 |
| Piergozy | Under Polish administration | Górowo Iławeckie | 1945 |
| Piergozy | Poland | Olsztyn | 1992 |