Šentjanž was formerly part of the German Empire. In the German Empire, the place was called Johanni bei Rietz.
The place is now called Šentjanž and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sanct Johann | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Sveti Janž | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Šent Janž | Yugoslavia | Gornji grad | after the Treaty of Saint-Germain |
| Johanni bei Rietz | German Empire | Cilli | 1941 |
| Šentjanž | Yugoslavia | Celje | 1945 |
| Šentjanž | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Šentjanž | Slovenia | Slowenien | 1991 |