I've checked Scotland for a Marriage between a Capaldi and Vendatelli but did not find anything. I have also viewed marriages upto 1900 in Cassino, but that was about a year ago now, and can't remember if they were on it?
I can tell you my Family are from San Michele, north of Cassino. If you find any more information, please let me know, otherwise i will let you know with anymore i find out!

Jamie