Quite honesty, I really don't know where you go from here.
You say he was brought up in an orphanage in Torino - did he ever speak of family, siblings? If not, it's quite possible that he was left at the orphanage as a baby and the orphanage named him. Even if that was able to be proved there would be nothing further that could be done with no known family line to follow.
Any answers must lie in Torino but cannot see online any families with the names he had. I suspect he was probably named by the orphanage.
Sorry I can't be of more help.
Annette