User blog comment:Frodo the 9 fingered/A Third Camp?/@comment-5323269-20120730192739

I've always been thinking that the seventh half blood must somehow be both Greek and Roman or neither because i just don't think it would make sense if the campers are uneven. I couldn't really come up with how this would be possible, but this third camp is a good idea. I can definately see this happening.

My only other idea was that maybe an immortal demigod, such as Hercules, might be the seventh. Yes, Hercules was originally Greek, but he was made a god and he has two names Heracles (Greek) and Hercules (Roman). Maybe he has two different aspects like the rest of the gods despite him being a only demigod. (Which would potentially make him the seventh since he is a half-blood, just as the prophecy requires.)