We have a common ancestor in Fanny Piercy Lombardini, her son, Joseph, was my great grandfather.
Did you progress your research any further beyond William Lombardini and his father? I am going to try and pick this thread up and pursue but I wondered if you have done this already.
Do you have any information that could indicate where William was born in Italy?
Also, I wonder if you have researched the Fanny Maria Piercy?