Would it be weird if named my daughter Lorelei?

I think you should use the name if it's the one you really love. I don't think an x from 5 years ago with a child with the name who you never see and who doesn't even live in the same state is going to be a problem. Lorelei is a really nice name and I like that you are spelling it Lorelei. I hate the spelling with the a.