I should have added: I'm aware that this doesn't answer the question of whether this version of DORMI DORMI was adapted from an Italian pop song or perhaps a traditional Italian folk song. I suspect it was, but tracing it will be difficult, since searching for "Dormi Dormi" brings up lots of unrelated (but interesting) stuff, and especially, it leads into web sites and books that are completely in Italian, which I don't understand. I enjoy the challenge though, and will continue when I have time, which might not be until next week.