Hello, Sue: As of yet, I have no information on a connection between your Krohn & Schunemann's and mine.
Christina Dorthea Maria SCHUNEMANN had a sister named,
Magdalena Maria Elisabeth SCHUNEMANN b. June 14, 1810, Sanitz, Mecklenberg, Germany. This is all I know about her.
I don't know who she was married to. Her sponsors at her baptism were: Magdalena Sophia Stender, verhelichte (married) Hennings. Oberhofer Kruge; Catharina Elisabeth Steffen, vereh. (married) Balzer in Sanitz; Anna Sophia Maria Milhahn, vereh.(married) Grahl in Sanitz.
Her parents were: Joachim Heinrich SCHUNEMANN & Magdalena Maria Elisabeth DOSE.
I don't know the names of my great grandfather, Carl Johann Heinrich KROHN's siblings. He did have a son named Friedrich
Krohn, b. 1868, but his wife was named Emma Vogt.
Please keep in touch if you find a connection.