I was watching "Game of Thrones Conquest & Rebellion" (animated series) and in the beginning while talking about the Targaryens, Viserys says (he is the one narrating history of the Targaryens):
"Twelve years before the Doom, despite the sneers of his rivals, Aenar Targaryen abandoned the capital with his family. Legends claim that his daughter foresaw the destruction of the city in a dream""
Because of the dream/premonition, Targaryens are the last of the Valyrians who escape/are exiled and survive.
My question is who is that targaryen ? I really did not understand that part!