question regarding "fu" after parent name in birth certificate

[skrivskithar]

Hi there. I have many birth certificates of Italian ancestors where all the sons of "Maria Luigia di Candia" have this format after her mane ""Maria Luigia di Candia fu Salvatore". I know that "fu" refers to a death person, but Salvatore was not her husband (it was Saverio Martino), does this mean she was previously married (in the late 1800s)? Or that her father was called Salvatore?

[erudita74]

it means she was the daughter of deceased Salvatore. Her father's surname would be the same as her surname (what we in the U.S. call a maiden name).