My mother is Dorothy E. Dornberg, daughter of Edgar B. Dornberg and Nellie Hawkes. Edgar B. is the son of Dr. A Louis Dornberg, descended from Leander von Keisewetter.
My brother has a history of the Dornberg family with photos and pedigree charts, and can mail you a copy if you don't already have one. I am interested in updating the history and the pedigree charts, and making copies of the original photos that appear in the history. It was compiled by R.F. Prael, 2814 N.W. Cumberland Road, Portland, Oregon and dated 1941. I suspect that R. F. Prael is deceased, but one of his descendants may have the original history. I notice that a Dr. Charles A. Pettet (likely David Pettit's great-grandfather?) married Elizabeth L. Dornberg, also descended from Dr. A. Louis Dornberg.
I am also interested in finding out more about Leander von Keisewetter and Fraulein von Emerling's European background as well as Joanna Schultz's ancestry, and would like to exchange information with you and David Pettit.
William (Bill) Beck