Tessa,
Thank you so much for your response, I was so happy

Your information is very helpful as I want to write the Comune of Citta Di Castello for some more records.
I think the clerk might have made a mistake when filling out Eugenias birth record. After your attachment of the marriage record showing Tomassos dad as Domenico, I believe Eugenias father was also Domenico like her brothers Tomasso and Agostino.
I do have the marriage extracts for Eugenia and Giuseppe. They are my GGgrandparents.
I do not have the marriage extracts for Agostino.
I have never seen the marriage records for Tomasso before. Thank you so much for sharing the link with me. It really helps.
Tomasso, Eugenia and Agostino also had another brother and his name is Fedele Serroni born in 1865. I found him on the Ellis Island ships manifest. It lists his wife as Albina Urbanelli. Brothers Fedele and Tomasso married sisters Albina and Mafalda, so cool. I wonder if there is a marriage record for Fedele and Albina?
~Emily