In some sources, such as Leonie Frieda's "The Deadly Sisterhood", his name was given as Michelotto.

Please forgive the untimeliness of my reply to your post. I just discovered this site very recently. Loved your comments about Lucrezia's reaction to Cesare's rejection of their intimacy. This man has been coming on to her since she was a child and now that she is a woman and turns to meet him head-on and expects him…