Interesting connection: I have been attempting to find the birth place in Germany of Wilhelm Hamann (born 12-02-1861). His wife Theresa Fenner was born in Sammenthin, Arnswalde (Kreis) Brandenburg Germany, 11-18-65. I think William's parents are Wilhelm Hamann and Caroline or Catherine Kaiser. I think "your" Sommenthin maybe Sammenthin. This village is now in Poland.