Hmmm.....
Penelope nn Plum- no
Phoebe nn Plum- no
Pansy nn Plum- no
Philomena nn Plum- no
Praskovia nn Plum- no
I'd say no, but
Prunella as someone suggested would be the only one I can think of that would work. I think it would be better if there was a reason behind calling her Plum, like she kept grabbing plums from the fruitbowl to eat or something.