I like
Claire. I think it's very classic but also still has a little spunky/modern feel to it. One of the very few names that posess both those qualities in my opinion. I like it both as a middle name and first name. I probably prefer it as a fn because it seems a teeny bit filler as a mn to me. I think
Clara is alright but not as nice as
Claire. I find the extra syllable a little unecessary-
Claire is already so feminine on its own, why the extra "ah" sound?
I like
Claire Louise as a combo :)