Lažanek was formerly part of the German Empire. In the German Empire, the place was called Lažánky.
The place is now called Lažánky and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Lažanek | Austro-Hungary | Boskowitz | before the Treaty of Saint-Germain |
| Lažanky | Austro-Hungary | Boskowitz | before the Treaty of Saint-Germain |
| Lažánky | Czechoslovakia | Boskovice | after the Treaty of Saint-Germain |
| Laschanek | German Empire | Boskowitz | 1939 |
| Lažánky | German Empire | Boskowitz | 1939 |
| Lažánky | Czechoslovakia | Boskovice | 1945 |
| Lažánky | Czechoslovakia | Jižní Morava | 1992 |