Thank you! I wondered if it was her father's name or her maiden name. Here is the image..

Could someone please help me figure out what "flu" means on this information I found written in an box of old photos. It reads as follows:

Sig. Annunziata Di Domenico
(flu Luigi)
Macchia Valfortore
Compobasso, Italia

Also, I could use help with the second line below. Possible address? And it looks ...