it would sound like "Samuele Pipino/Pipini"[0], a real surname in italy which is the roughly translation of the surname as it comes from pepin d'heristal or piper from latin (pepper). There isnt probably a drect translation from venetian, but one from italian
The imagery of each of the words is significantly different. "Newhouse" inspires the image of what it says on the tin, a new house.
Casanova inspires the image of a castle (Casa), and maybe something new ("nova") or even a supernova. It's also likely that most English language people know at least one "Jacob," so the name has baggage with past associations versus "Giacomo."