Well some people find Carla and Diana dated but since they and their names are so associated with glamour (Carla Bruni-Sarkozy, Princess Diana), I love them and don't see them as old or frumpy or, well, dated. Same goes for Samantha (Cameron) and Jacqueline (Kennedy) though I don't find the names quite as beautiful. Oh, and Melanie- I love the name and the Gone With the Wind character, and I know a wonderful Melanie IRL who was actually named after her!
Rachel (by far my favorite dated name! It's on my top 5 regardless, I would love to have a little Rachel one day!)
Agnes (although I think this is slowly coming back in)
Sarah (although I don't really see this as dated--it's still in the top 50, I believe. But it's the same with Rachel--in my state it made a huge leap in the past year and is twice as popular in my state as it is nationally)
I also love Hazel and Olive, a lot of the people I mention them to in the real world find them "really old fashioned". I even had a customer through work whose name was Hazel, she couldn't believe that Hazel was fashionable again. So among the non-Berries, I would include names like Hazel, Olive, Violet, and Adeline...