Lola, because Lottie (although sweet) isn't a full name. Should be Charlotte,with Lottie as a childhood nickname. Charlotte is a lovely classic name (I prefer it to Lola really), although very popular. Gives her options too, at different stages of life she could choose to be Charlotte, Lottie, Charlie etc.
Lottie sounds cute on a little girl, not sure how it would sound on a grown woman. Or there's Lotta, less cutesy.