Following on from what mmogno has said, my thinking is that Anna was Paolo Streva and Vincenza Salpietro’s only child. I'm understanding they were married May 1838 (day ?) in Corleone; and then Paolo died the year after Anna was born. I searched the marriage records yesterday and re-searched again today, when I noticed that unfortunately the civil records for 1838 are incomplete. However, this looks to be their church record here at No 700:
https://www.familysearch.org/ark:/61903 ... cc=2046915
Paolo Streva’s mother was Anna Dragna and his father was Settimo as mmogno has said. Vincenza’s parent’s are listed there too – deceased Pasquale and Vincenza Bono? Sorry I don’t read Latin, so hopefully mmogno can correct and add to the information.