Ješovec was formerly part of the German Empire. In the German Empire, the place was called Erlenberg.
The place is now called NN and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jeschowetz | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Ješovec | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Ješovec | Yugoslavia | Šmarje | after the Treaty of Saint-Germain |
| Erlenberg | German Empire | Cilli | 1941 |
| Ješovec pri Šmarju | Yugoslavia | Celje | 1945 |
| Ješovec pri Šmarju | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| NN | Slovenia | Slowenien | 1991 |