Juknaičiai was formerly part of the German Empire. In the German Empire, the place was called Jugnaten.
The place is now called Juknaičiai and belongs to Lithuania.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jugnaten | German Empire | Heydekrug | before the Versailles Treaty |
| Juknaičiai | Lithuania | Šilutė | after the Versailles Treaty |
| Jugnaten | German Empire | Heydekrug | 1939 |
| Juknaičiai | Soviet Union | Šilutė/Šilute | 1945 |
| Juknajčjaj | Soviet Union | Šilutė/Šilute | 1945 |
| Juknaičiai | Lithuania | Šilutė | 1992 |