Langensee was formerly part of the German Empire. In the German Empire, the place was called Langensee.
The place is now called Kociołki and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Langensee | German Empire | Goldap | 1939 |
| Kociołki | Under Polish administration | Gołdap | 1945 |
| Kociołki | Poland | Suwałki | 1992 |