C really isn't a good letter for me but I'll do my best. Girls first: Caroline, Chiara or Ciara (prn like Kiara), Cecilia... And then i get stuck, for K I've got Kiara, Kimberly, and Kacey. Boys next: Cassidy (YES, Cassidy for a BOY!), Carson, Carter... Okay, C is a really really bad letter for me! :)
For boys I have a long list of C names, I will stick with 5 though (okay technically 6 - smile).
Calder or Coulter
Coralie or Coraline
Carly (it would be to honor my dad)
Oh, I have so many for girls but my top five are as follows:
And for boys, I have a little fewer...
Sorry I couldn't be more helpful - good luck!