I sure hope you are still there! I'm looking for any information on John David Schlemmer's wife Mary Rebecca Johnson. Do you know anything for sure about her? There were several women with the same name, and I can't definitely pinpoint which one she is.I have her birth, death, marriage and children, but there are lots of questions about who her parents were. We are related. I am the Great-granddaughter of Katharina Schlemmer Jackemeyer who was John David's aunt. Peter was her brother and Jean Pierre were Peter and Katharina's father.