User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-125.164.88.169-20120904080727/@comment-190.23.123.167-20120908191801

Actually, Rick Riordan only said that "Hercules" is his "Roman name" and that's what most people call him, even Greek demigods. He never said that he was in his "Roman form", so I don't think there's any difference between Heracles and Hercules, considering that he was a GREEK demigod. RR even pointed out that his dad is Zeus. ZEUS, not Jupiter.