Gotlieb Kossman married Louisa Maak (SP). They were most likely from East Prussia.
They had two daughters that I know of.
1. Amelia, born Aug 16, 1855, Rudin, Kris Schubin, East Prussia, Germany (now Poland), died April 9, 1930, Muskegon County, Michigan, USA.
She married Carl H Kops, December 25, 1878 in Germany. Carl was born February 22, 1853, Kirsh Dorf, Kris Schubin, East Prussia, Germany (now Poland), died October 22, 1928, Muskegon County, Michigan, USA
2. Augusta, born June 21, 1857, probably East Prussia, died August 27, 1947, Poy Sippi, Waushara County, Wisconsin, USA.
She married August Westerman, born about 1852, Detmold Lippe, Germany, died - unknown.