First baby, DH won't agree on anything apart from Alice... I don't love it but I'll use it. I tried to compromise by nick naming her Alice and having Alison on the birth cert. Not an option apparently.
I wanted Lydia so badly 
Anywhooo, what about middle names? Things I've considered are
Helen (my Mum's name)
Posy (love it, loved the book as a child. Thanks to the other OP)
Diana
Delphine
Athen
Any ideas? What do you think of them?