Święty Gaj was formerly part of the German Empire. In the German Empire, the place was called Heiligenwalde.
The place is now called Święty Gaj and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Heiligenwalde | German Empire | Preußisch Holland | 1939 |
| święty Gaj | Under Polish administration | Pasłęk | 1945 |
| Święty Gaj | Poland | Elbląg | 1992 |