baby peterson... who are you?

Josh's challenge:

Challenge:
Jessica didn’t ask me about this, but if you can guess at least the first name, you really will get a gift certificate $20 at the restaurant of you choice.
Good luck
1) You can have 7 guesses, so don’t use them all at once.
2) You can guess up till Mid-night.
3) If you’re lucky, I may give some hints to narrow down, but not really help.

the first initial is one of these letters:
C, D,L, R, X, Y