Thank you for the information. I believe that my grandmother's family originated in the Caoria area, and that her birth in Tschagguns was because the family was there for other reasons, but I have not researched it yet. Sperandio is my next on the list of lines to research at the Family History Center. They have wonderful worldwide church records on microfilm, in case you have access to that in your area. If you haven't already done it, you might want to try a web search.
When I go further in my Sperandio research, I will keep in mind the names of your ancestors, and will let you know if I find any of possibilities for you.