Board Thread:General Discussion/@comment-5047768-20131028040230/@comment-4839682-20131105045958

WalterEDisney wrote: I'm sorry, but I disagree with those who say that Hercules and Ariel are cousins. King Triton most likely was not Poseidon's son Triton, because Poseidon's son was a god, not a merman. The source of that belief comes from the original draft of The Little Mermaid, in it, Triton and Ursula are brother and sister, children of Poseidon. This was dropped from the final movie, but is still a present element in the Broadway musical.

This could still be a fact in OUaT, however, as the show picks and chooses what elements it wants.