Jane, for the twin names of Apple and Orange! (I also loved the idea of Lemon and Lime, but I knew I'd keep forgetting which one was supposed to be which. But thanks to Karen and Jane for that idea!)
And K., because I'm stealing her suggestion of "Jelly" as a name for one of the twins, and turning it into "Jellyman" for DH (you know, like Finding Nemo with the sea turtles -- it's a lot funnier if you say it with the surfer-dude voice).
Jane and K., if you're willing to give me an email address, you will be receiving an Amazon gift certificate as your reward. Please email me at "grapemn AT comcast DOT net" to claim your prize!
Thanks to everyone who sent in ideas. This was fun for me. And really, that's the most important thing, right? Of course right.