The Giuffrida name is quite popular in the area where I live. The majority of the Giuffrida's in the Lawrence/Methuen/North Andover/Andover Massachusetts (and southern New Hampshire) area came from Catania, either from Trecastagni or Viagrande. My wife is indirectly related to a Giuffrida family. I'm sure Giuffrida is not native to just Trecastagni/Viagrande, or Catania in general, but any Giuffrida research I've done points to that region of Sicily.