I like Georgia Brett and Georgia Lousie. Georgia Violet sounds kind of funny IMO and Georgia Hadley/Marianna seem like to much of a mouthful.
I admire your going for a name that means something to you, it will be nice for DD to have a name all her own and not have 6 other girl's in her class saying "Oh! My middle name is ... too!" My mn is Elizabeth and it seemed like every other girl's mn was the same... M's middle name is Marie, I would have preferred something else but it's a big family name.