Zahna is a town in Wittenberg in Germany. What is the meaning and origin of the name of that town?
Glancing at the age and ethnic history of the town and region (it goes back to 2000 BCE) and its proximity to Poland and the Czech regions, I’m going to bet this takes some very special expertise to answer properly. 
Are you trying to connect the town with Anton Zamloch?
No, it’s something unrelated.