I'm not a big fan of
Lottie. I picture a
Lottie as a 70 year-old, chain-smoking woman with a beehive, hunched over a slot machine at a casino. It's not a "fresh" name in my mind.
Charlotte Juliet...honestly, I think
Charlotte Julia sounds a lot better. The double -ette sounds in both names of the combo throw me off, and they sound a little TOO precious. Like a porcelain doll high on a shelf that no one is allowed to touch.
I don't like any of the alternatives, either. Sorry!