Hercules and Meg talking about how Herc is indeed related to Ariel.

I did too
those books were amazing

I knew about before Percy Jackson. The series were just a happy bonus. :)

Wouldn't he be Ariel's uncle? Triton is Hercules's cousin since their fathers (Zeus & Poseidon) are brothers...

Yeah I thought it was great uncle at first, but it turns out that Triton and Hercules are first cousins, so when you go one generation down it means they're first cousins once removed :P