Originally Posted by DonDadda59
Lyanna Stark I'm guessing
But one bit that might possibly eliminate Rh T as the papi is Jon not being impervious to fire like his possible aunt.
Neither was Visery's but that was definitely her brother. Not all T's are immune. Shown in Visery's crown and the incident in Summerhall which I believe are from the dunk and egg stories.
Basically, Some T's wanted to hatch dragon eggs, went to Summerhall, burned the place down, 99% sure no actual dragons hatched. However it was the day that RH T was born so.... maybe he was the dragon that was hatched but clearly not the dragon they meant to hatch.