Hi Janet, I saw your post on a Wayne County listserve from 2007, but when I tried to email you, the email didn't work. I will post my reply here. You were researching the Martwick line, and in particular were looking for where in Germany the family resided. I also noticed that you mentioned that you weren't sure about one Frederick's sisters' names. I am descended from that sister. Her name was Wilhelmina "Minnie" Martwick b. 13 Feb 1853, d. 11 Jul 1942 and she married Moses Winnie. I have what I believe to be her family bible. I was just going through it the other night and there were some notes about where in Germany they resided:
"Augusta Kennedy born near State Plornick (or Plotnick?) and Posen, Germany (Trummel Ort)"
I had always heard Trummel Ort, Germany, but could never find it on a map.
I believe this is in present day Poland, part of the old Prussian empire.
They were all born in Trummel Ort and came over about 1860. Also, Michael's wife's given name was Johanna C. Schellern according to Findagrave.com, though I have seen it as Hannah on the 1870 census. Also, on the 1870 census, they are listed under the surname Matwig. Hope this helps.