Jaehaerys I was the third son of Aenys I, and the heir to Aenys's line after his older brothers, Aegon and Viserys, were killed by their uncle Maegor. Ascending to the throne after Maegor's death, Jaehaerys began the longest reign in Targaryen history, sitting on the throne for 55 years. Known as "the Conciliator" and "the Wise," Jaehaerys's reign started when he was just 14 years old, but was marked by thoughtfulness and wisdom. He was popular among the people of Westeros and was remembered for bringing stability and peace after the fraught years of his uncle's reign.
Jaehaerys lived to the age of 69, having outlived many of his loved ones, including his sons, Aemon and Baelon. Because Aemon only had a daughter, whereas Baelon had three sons, the Great Council chose Baelon's son Viserys as the new king.
