I like the name
Thomasina, it's pretty and underused. I think of the
Beatrix Potter character,
Thomasina Tittlemouse if I think of anyone. I actually studied
Arcadia at university but can't remember it at all so I think I'll go and dig out my copy.
I also like
Minerva nn
Minnie. There was a family on Wife Swap the other day and this was the name and nickname of one of their daughters. (The other sibs had more common names like
Holly,
Joseph,
Daniel,
Isaac and another I can't remember).