There was no U.S. until 1790, over a hundred and fifty years later, but they could have migrated to the North American colonies. I've seen no evidence that father Andrea immigrated to the colonies; he seems to have died in Malamocco, Venice, Italy. After all, he had a fine business to manage and couldn't be traipsing after pie in the sky, like those 'Gentlemen Adventurers' from London who voyaged to Jamestown to 'pick up gold from off the ground'. Had he travelled with his son, it would have been mentioned in tandem with his son's records. There are certainly enough of us looking.