"And if you insist on something "themey" look at BtNs twins section -
http://www.behindthename.com/twins.php - now that's how to do it."
Amen to that.
I actually don't know that many twin sets, but besides Jennifer and Jessica there was a Richard and Robert in my class back in school.
Oh, I did know a Heather and Bonnie, which isn't bad.
"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."