Giovanni Nuvoletti only appeared in a small number of films, and is best known for his brief role in Mario Bava’s Bay of Blood (as the count who kills his wife in the wheelchair and is then rapidly dispatched). He also played the Judge in the Klaus Kinski western The Beast and also played a Professor in the Luciano Salce comedy Prof. Dott. Guido Tersilli, primario della clinica Villa Celeste convenzionata con le mutue.
Nuvoletti was actually a Count and was married to Clara Agnelli (Ira Von Furstenberg’s mum). There’s an obituary (in Italian) here: http://qn.quotidiano.net/2008/04/04/77888-morto_conte_giovanni_nuvoletti.shtml