I love
Pearl! It's on my list (along with
Rose ;) as both a mn and a fn, though I'd much rather see
Pearl (and again,
Rose) as a fn. I wouldn't be surprised if it made a comeback, and I think it's ready. It fits in with the current
Ruby,
Grace, etc trend whilst still remaining rare and offbeat. I'd say go for it!
Rosaline is also lovely, btw =). Sorry your friend
Anne has to deal with the same comment often, but at least she has a lovely fn!