the treatment of diseases, injuries, and other physical ailments with baths and bathing, especially in natural mineral waters. Origin of balneotherapy.
The name Percy originated in France. It means piercing the valley which also can mean fighting the lower side, the evil side, to reach justice. Jackson means son of Jack. I know, I don't get it either.
Being a child of the Big Three (Zeus, Hades, Poseidon), Percy is possibly the child referred to within the prophecy, which foretells that the next half-blood child of the Big Three to reach the age of sixteen would make a decision that would either save or destroy Olympus.