I am indeed related. My grandmother was Maria Fahlmann who married Johann Ferdinand Zurowski. My father was their 3rd child, Joseph Gottlieb Zurowski later Joseph G. Gerow. I am born two years before my father died. My mother remarried in 1968, and I have my step-father's surname plus the pre-1948 surname of my father, Zurowski. My grandmother's parents were Katharina Ehmann and Johann Andreas Fahlmann. Katharina Ehmann was the eldest daughter of the "Patriarch" Josef Ehmann of the book to which you refer, and his eldest child by his second wife, Mariane Reiländer (whom the book calls Maria Anna Rheinlander).
Hope this helps you place me correctly. How are you descended from the Patriarch?