We received a 'family tree' printout in his adoption papers: every litter had group names.  So all of Charlie's littermates were 'Desert Oasis' something.  I don't remember if they were all Peanuts characters or not, but that was a possibility.  We have lots of names for him, I frequently call him Sir Charles of Wigglesbutt.  Yeah, dog breeders can be a nasty bunch.  Our first rescue poodle, Celeste, came from a breeder.  When her mate died, she became nasty and they had to get rid of her.