Lazek was formerly part of the German Empire. In the German Empire, the place was called Łążek.
The place is now called Łążek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Lazek | Russian Empire | Novoradomsk | 1914 |
| Łążek | Poland | Radomsko | 1921 |
| Łążek | German Empire | Welungen | 1939 |
| Łążek | Poland | Pajęczno | 1945 |
| Łążek | Poland | Częstochowa | 1992 |