Oh wise ones - after much disagreement we've whittled down our list of names to the following:
Arelie
Aurelie
Isobel/Isabel/Isabelle (even if we agree on the name we disagree on the spelling!)
Leonie (to rhyme with peony)
Middle name will be Catherine.
None of these are my top 3 (currently Alice, Chloe, Felicity) but I don't think he's going to be persuaded (and be fair he can't persuade me into his favourites either) so what do you think we should go for?