My great-great grandmother was Marie Dorothea Roggensack. She was born 3-2-1815 in Vogelsang, Germany(Prussia) and married Friedrich Wilhelm Bauer. She ended up in Saginaw, Michigan in 1873 after the death of her husband.
Marie Dorothea's parents were David Andreas Roggensack and Sophia Ilsabe Magdalena Lange from Alt Bukow. David's parents were Joachim Martin Roggensack and Anne Elisabeth Blievernich. And finally, Joachim's parents were Martin Roggensack and Cathrine Dorthie Jarchow. I know there were Kroger families in the area, I bet we are connected somehow. If any of this sounds familar, or you have since learned any new information, please email me so that we can share and compare. firstname.lastname@example.org I also have a small website with descendancy info at www.ladypines.com