My great-grandfather, Frederich Schroeder, married an Amelia Koepke (dates for marriage, birth, and death unknown right now). She had three siblings: Anton, August, & Bertha. It seems that none of them ever married or had children. This would have been in and near Clinton, Wisconsin, late 1800's to the early 1900's. Does any of this sound familiar to anyone? Does anyone have further details?