Fernando - how are things going? Good to see all this Korndorffer stuff. Christian Rudolph first settled in St. Louis for a year or so before moving to New Orleans. My book has the reference for that information. Also, on the question of one or two f's, I have a copy of the an original signature of Johann Phillip (I may have just mispelled Phillip - Philip?)and I can look it up, but I'm pretty sure it was two f's.
Did I EVER send you my book?
I've got birth certificate for my grandmother, Mary Brady Korndorffer. Don't believe i have those dates wrong - but I'll check later. And I've got Christian's death certificate which give birth date. Also have seen his tombstone with the birth date.