In December of 2004 I heard from Bob Behnen, who had come across my genealogy site. He was a genealogy researcher who was seeking further information about the Berg Church Records, which I have mentioned in several places. He has since accessed the information he sought, but in the process of corresponding, he very kindly sent me information that pushed back my ancestral records for several generations, and I thank him for that. Here is what he said:
Margaretha Blind is the maternal great grandmother of my grandfather Frank Sullivan's mother, Caroline Buertel. The two genealogical pedigree charts below show now a complete four generation chart for my great grandmother, Carolina Buertel (1843-1885), and also a chart that pushes her maternal grandmother Margaretha Blind's chart back six generations in four branches.
It turns out that this family came in large part from the Dennweiler-Fronbach area of the Pfalz, at least the known ancestors.
Also here is an article about Bob Behnen available on the web: A detective of his own past.
Carolina Buertel's Pedigree (3 generations)
Maria Margaretha Blind's Pedigree