Hello, it seems Marandola is a common surname in Cervaro and Cassino, both in the Frosinone province, and Rocca D'Evandro in Caserta province. It's also common in Rome.
https://www.cognomix.it/mappe-dei-cognomi-italiani/MARANDOLA

Soave is common in Veneto, as mjclayton1 said, but also in Lazio ...

Hello, can you tell me something more about your ancestors? It seems the surname CAO is more prevalent in Sardinia and Veneto regions. In Veneto you can find it especially in Vicenza province, rather than Venice, and particularly in the towns of Trissino, Arzignano and Brendola.

I can gladly help ...

Yes, Pippo is a nickname for Giuseppe, and no, it's never spelled Giuseppi (unless it's a specific surname, of course).

Hello, I'm pretty sure that's him: https://leva.archiviodistatovenezia.it/ ... ca/348533/

I don't know if you're still looking for him though, it's been a while.