Aegon’s eldest son Duncan, Prince of Dragonstone and heir to the throne, was the first to defy him. Though betrothed to a daughter of House Baratheon of Storm’s End, Duncan became enamored of a strange, lovely, and mysterious girl who called herself Jenny of Oldstones in 239 AC, whilst traveling in the Riverlands. Though she dwelt half-wild amidst ruins and claimed descent from the long-vanished kings of the First Men, the smallfolk of surrounding villages mocked such tales, insisting that she was only some half-mad peasant girl, and perhaps even a witch.
It was true that Aegon had been a friend to the smallfolk, had practically grown up among them, but to countenance the marriage of the heir to the throne to a commoner of uncertain birth was beyond him. His Grace did all he could to have the marriage undone, demanding that Duncan put Jenny aside. The prince shared his father’s stubbornness, however, and refused him. Even when the High Septon, Grand Maester, and small council joined together to insist King Aegon force his son to choose between the Iron Throne and this wild woman of the woods, Duncan would not budge. Rather than give up Jenny, he foreswore his claim to the crown in favor of his brother Jaehaerys, and abdicated as Prince of Dragonstone.
Even that could not restore the peace, nor win back the friendship of Storm’s End, however. The father of the spurned girl, Lord Lyonel Baratheon of Storm’s End—known as the Laughing Storm and famed for his prowess in battle—was not a man easily appeased when his pride was wounded. A short, bloody rebellion ensued, ending only when Ser Duncan of the Kingsguard defeated Lord Lyonel in single combat, and King Aegon gave his solemn word that his youngest daughter, Rhaelle, would wed Lord Lyonel’s heir. To seal the bargain, Princess Rhaelle was sent to Storm’s End to serve as Lord Lyonel’s cupbearer and companion to his lady wife. Jenny of Oldstones—Lady Jenny, as she was called by courtesy—was eventually accepted at court, and throughout the Seven Kingdoms the smallfolk held her especially dear. She and her prince, forever after known as the Prince of Dragonflies, were a favorite subject of singers for many years.