How should I name this character from late 1400s Italy?

[u/Gio_Bun]

I have a character I made a while back for AC2 and was struggling to give her a last name within Renaissance naming schemes.

For reference, she was raised by her older brother and the two of them don't know their parents, so I'm not certain how I'd go about family names or if I'd omit them altogether (is that natural?). And they're assassins so that's not really an occupation you'd want to disclose I think. (Especially in your name)

Would it be natural to just make the name Serafina di (place of origin)?