I guess this is hard to define because what do you mean by "classic". For me, since my first language is English, I think, "What name could I have if I was transported in time to England in the 1500s, or really a lot of
Europe?" Unfortunately this leaves out
Charlotte,
Caroline, and other names I think became more popular later on. Though, I still consider them classics. (Like I said, hard to define.)
I like
Elizabeth or
Isabel (more popular in some countries). I think
Isabel (I know we are more used to
Isabelle or
Isabella, but this is the version I've seen on some sites. I'd have to check primary sources) is more classically beautiful, while
Elizabeth has a regalness to it for obvious reasons.
Same name, different versions, so... I don't have to chose. ;)