Yeah, that's fantastic!
Having taken a look at both sides of Ferlinghetti's family, I'm afraid there's not much to go on with his father's side. I've found a couple of articles from Italian sites about his father's family having been traced back quite a ways in Gussago, Brescia, but sadly I can't seem to find any records to that extent that have been digitized. I managed to trace his mother's paternal line quite a ways, as the family as a whole was rather notable (the wife of the man who founded the Monsanto corporation was an heiress of the branch of the same family that settled in Louisiana), though it doesn't look like any other branch of the family has been put here on WikiTree yet. If I get the chance, I may record some more of the Monsanto family here for future researchers & the like.