Complex sentence: His grandfather Francesco, becoming part of his name, was also a fisherman from Aci Trezza who built "gelatiere" machines (ice cream maker) part time, when he was not fishing.
Split into simpler sentences: His grandfather Francesco, becoming part of his name, was also a fisherman from Aci Trezza. It turned out that his grandfather built "gelatiere" machines (ice cream maker) part time, when he was not fishing.