What a kind offer! I am researching the name Zankner. (There is an umlaut over the first a.) I know of a Gottfried Zankner from Gross-Osten who lived there in the 1830s. The town is now called Osetno in Poland. I know many of their records were destroyed in the war but there is a cemetery there that may show his name. They were evangelisch. His name is written as Zenkner and sometimes as Zaenkner. Any future information will be greatly appreciated! Danke!