Jenkau was formerly part of the German Empire. In the German Empire, the place was called Jenkau.
The place is now called Jankowo Gdańskie and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jenkau | German Empire | Danziger Höhe | before the Versailles Treaty |
| Jenkau | Free City of Danzig | Danziger Höhe | after the Versailles Treaty |
| Jenkau | German Empire | Danzig | 1939 |
| Jankowo Gdańskie | Poland | Pruszcz Gdański | 1945 |
| Jankowo Gdańskie | Poland | Gdańsk | 1992 |