Yes the name was Seggi instead of Sergi. As I said I wrote today to both Viagrande and Aci Bonnaccorsi requesting birth and marriage records for Salvatore Sergi & Lucia Sapienza. I think I was able to give them a good idea on the dates.
I am hoping that even if Lucia was not from Viagrande we might find the marriage banns in Aci Bonnaccorsi where we are sure Salvatore was baptized at the church of Santa Maria dell'Indirizzo.
Grazij
Michele