Aegon Targaryen was the son of Crown Prince Rhaegar Targaryen and Princess Elia Martell. He had an older sister, Rhaenys Targaryen, and a younger paternal half-brother also named Aegon but raised under the name, Jon Snow. For mysterious reasons, Rhaegar allegedly abducted "Jon's" mother Lyanna Stark, sparking a rebellion that ultimately deposed House Targaryen as the ruling house of Westeros. Rhaegar was killed by Robert Baratheon, who was Lyanna's betrothed, at the Battle of the Trident. Soon afterward, Aegon and Rhaenys were brutally murdered along with their mother by Ser Gregor Clegane during the Sack of King's Landing.