Hi !!!
Fanny is one of my favourite English names since I was a child.
It has a simple, aristocratic, sound as I came across it a lot in 1700s-1800s novels.
In Italy
Fanny is also the name used for Fawkes, the phoenix in
Harry Potter.
I noticed that is a slang but not everywhere in the English-speaking world and not everyone Say It is actually so linked with it anymore.
WDYTO
Fanny as full name only?
Personal Name Lists
https://www.behindthename.com/pnl/125456