I am also searching my German ancestors. I have quite a bit of information on Gretge Rethwisch, she is my great grandmother, I show her parents as Hinrich Rethwisch and Antji Klindt, and she was born 27 Jan 1841 in Krokau. My grandmother is Minnie Louise (Rethwisch) Steffen. I have not been able to find any information on the Steffen side of the family.
I would appreciate your contacting me, you may email me at firstname.lastname@example.org
Thank you, Sandra (Webster) Horton