Daniel. We are on a similar search. I'm not sure how much you know, but the surname Ivaldi is found in the 12th century peace accord documents between Genova and Pisa. The name is found in Nice, France and Genova, Pisa, Torino, and other small towns between Milan and Genova. My father is Genovese. I have a family tree that goes back about two generations and a few uncles' names. There is a small town called Piemonte (*similar to the region) in which the last name Ivaldi is in the hundreds. My grandfather Sebastiano came from there to Genova along with a few siblings.
Do you have any other info?
Davide Ivaldi
Mishawaka, IN