I dont really care for either. I dont like
Clara at all. I think I really love
Clare, but I just cant use it as a fn. I really loathe the added "i" in
Claire. Its trendy, and I like names to be spelled how they sound. There is no i in the pn. (I have the same problem with
Shawn being spelled
Sean and many others.)
I would stick with
Clare (or if you must,
Claire). I am horrible at girl combos, but my only suggestion would be a little longer mn. I like "unbalanced" names where one is short and the other is longer (short fn, longer mn, and vice versa).
Looking at the others suggestions I like
Aine's suggestion
Clare Olivia