I am descended from Johannes and Barbara Boetsch Moessinger of Wuerttemberg, Germany. They had a son Michael Moessinger who was born May 31, 1668 om Wuertemberg. He married Martha Gruoner and had 5 known children: Johannes, Agatha, George, Anna and Michael. I only have knowledge of Johannes leaving Germany.
Johannes was born January 17, 1694, married Elizabeth and emigrated to America. Johannes and Elizabeth were the parents of 5 known children: Michael, Paul, Jacob, Maria and Johannes. Michael and Maria are found buried here in Pennsylvania, but I have no information of Paul, Jacob or Johannes leaving Germany.
This information is from the Messingers in Pennsylvania book you mentioned. This group of MOESSINGERS settled in the area of Northampton County, Pennsylvania. If you are interested and get to eastern Pennsylvania, the EASTON PUBLIC LIBRARY in Northampton County, is one of the best places to check out for Genealogy.
Your knowledge on the Messingers is fascinating. My email address is Nitetimer@fast.net
if you would like to talk more about this family.