Rhaegar Targaryen was the firstborn child of King Aerys II, aka the Mad King, meaning he was the heir to the Iron Throne.

As revealed on the season-seven finale of "Game of Thrones," Jon Snow is the legitimate son of Rhaegar Targaryen and Lyanna Stark.

GAME OF Thrones returned with an explosive launch to the final series - as Jon Snow learns who his true parents are. Jon Snow has spent his life as a perceived bastard, brought up by Ned Stark. One of the questions that has loomed largest is: Who is Jon Snow's father? He’s also the much older brother of Daenerys and her serpent of a … Rhaegar was the son of the Mad King, Aerys II Targaryen, and the older brother to Daenerys Targaryen. Eddard was Lyanna's brother, and promised on … Martin’s appendices, Meera and Jon were both born in 283AC (After the Conquest), the year Lyanna Stark died in the Tower of Joy. Jon was raised as the bastard child of Eddard Stark alongside his children Arya, Sansa, Robb, Bran and Rickon. She’s the same age as Jon Snow. According to George R.R.