Moana & Hiccup have more in common than most may think. Both are children of Chiefs, but they are not royalty (!). Both are striving to be useful for their respective villages, thought there is also that big unknown that lures them out into the ocean, be it by air or water. Both made friends with antagonists of their moveis (of sorts?).
Moana & Rapuzel are similar in a way that most Disney Princesses are. Both are children of (a sort) royalty, and both are not satisfied by the life they lead at home (or fake one) and their gaze are directed outwards, beyond their currently restricted lives. Both had gathered courage to seize the chance to go ‘outside’. And both have a drop of magic in them. ;)