YES!! Frederick Dankert was my greatgrandfather and he was indeed a silversmith in NYC! I knew well my great Aunt Helen and great Aunt Alice! (Helen had a twin who died at birth, by the way.)
I saw your other post under Rezac and Barbara Rezac was my great grandmother. I will have to look up all the info I have on the Rezacs, but I did not know until your post where specifically they came from in Austria. I will send another message when I have more time. I assume you know that Barbara Rezac was married twice--are you from the Goette line?