House Targaryen of Summerhall is a cadet branch of House Targaryen, a noble family of Valyrian descent that escaped the Doom. They lived for centuries on the island of Dragonstone until Aegon the Conqueror and his sisters rode their dragons in their conquest of the Seven Kingdoms. This branch of House Targaryen was established by Lord Baelor Targaryen in the year 349AC, precipitating the War of the Shadow.