Aegon II Targaryen, also known as Aegon the Elder, was the sixth Targaryen king to sit the Iron Throne, succeeding his father, Viserys I Targaryen, as Lord of the Seven Kingdoms. His ascent was disputed by his older half-sister, Princess Rhaenyra Targaryen, who had been their father's designated heir. Aegon and Rhaenyra fought for the throne in the civil war the singers called the Dance of the Dragons, in which both siblings perished. Aegon was married to his younger sister, Helaena.