The World of Ice & Fire: The Untold History of Westeros and the Game of Thrones (A Song of Ice and Fire)

by George R.R. Martin

The Aegon who is known to history as Aegon the Conqueror and Aegon the Dragon was born on Dragonstone in 27 BC. He was the only son, and second child, of Aerion, Lord of Dragonstone, and Lady Valaena of House Velaryon, herself half-Targaryen on her mother’s side. Aegon had two trueborn siblings; an elder sister, Visenya, and a younger sister, Rhaenys. It had long been the custom amongst the dragonlords of Valyria to wed brother to sister, to keep the bloodlines pure, but Aegon took both his sisters to bride. By tradition, he was expected to wed only his older sister, Visenya; the inclusion of Rhaenys as a second wife was unusual, though not without precedent. It was said by some that Aegon wed Visenya out of duty and Rhaenys out of desire.