Remembering
Sally may be *too* much. :)
I'd say use
Sally as the middle name, but if you're not that fond of it, then any
S name will do. My theory is that if it honors to you, then that's all that matters. Also, if Stone is - I'm assuming - a family surname, since it was her middle name, then I see no problem with it on a girl, as a middle name. It's the only time I'm OK with surnames as middle names for girl - if it's a family surname.
Just for the heck of it, these are the
S names I like:
SamanthaSandraSondraSarahScarlettShawnaSophiaStellaStephanieSusanSusannahSylvia
We bare our souls and tell the most appalling secrets. - "Little Women"