Namensvarianten:
- Jirkov
- goerkau
- Görkau
- Görgau
Geonames ID: https://www.geonames.org/3074110Koordinaten: 50.49979 13.44769
- Franz Effenberger an Leo Thun, Pilsen, 12. November 1853
- Anton Waldert an Leo Thun, Görkau [Jirkov], 22. September 1853
- Anton Waldert an Leo Thun, Görkau [Jirkov], 25. Dezember 1853
- Anton Waldert an Leo Thun, Görkau [Jirkov], 9. April 1854