I agree with a previous poster that Sienna is a very popular name... The amount of friends/people we know that have called their daughter Sienna in the last few years. We were actually considering Sienna for DD, but it was just so popular and we wanted something not so popular - which is hard! I haven't really heard of Kira... is it pronounced the same as Keira? I do like Sienna more out of both... but maybe there is another name you can both agree on? I do like your list!