So I think Agatha has been ruled out

and we are back to our original choice of Ada if we have a girl. However, we are a bit stuck on middle name ideas. My DD is Ivy Elizabeth, I like the short FN followed by a longish MN to balance it a bit and I don't want to use anything too common like Grace which seems to be every other little girls MN at the moment.
Suggestions so far (although they are all a bit short but I can't think of a long name to go with Ada),
Ada Clare (DH sister's MN)
Ada Louise/Louisa (Louisa is my sister's MN)
Ada Violet
Ada Marie (Marie is my MN)
Other suggestions please. Thank you...