Don't subject your twins to cutesy, themed names. Yes, same starting letter is a cutesy theme. My twin and I (Jess and Jen, respectively) have fought it, and you have no idea how annoying it is. It's bad enough that as twins, you struggle for your own identity without being compared to each other, but doing themey names makes it that much harder. Just pick two individual names you like and ignore what is "cute" for twins.
"There is within me (and sadly I have watched it in others) a knot of cruelty borne by the stream of love, much as our blood sometimes bears the seed of our destruction."