Rizzo reminded me of a muppet, so I started looking up muppet names and Rizzo was the little "Jersey-Italian" rat with an "attitude" lol, so it worked for me because I wanted him to have an Italian name for my landlords family's sake. Plus my favorite cafe near work is "Cafe Rizzo"
actually didn't notice until after I named him, but I figure I might have to aquire one of their cups before I leave Italy.