Jon Arryn was the Lord of the Eyrie, Defender of the Vale, Warden of the East, and Hand to King Robert Baratheon before the events of A Game of Thrones. He took Robert and Eddard Stark as wards and became a father figure to both. When King Aerys II Targaryen commanded him to kill his wards, Jon rebelled. To earn the support of House Tully in the rebellion, Jon married the much younger Lysa Tully. Throughout Robert's reign, Jon was left with most of the responsibility of running the Seven Kingdoms. When Stannis suspected the parentage of 퀸 Cersei Lannister's children, he brings his suspicions to Jon. Jon confirmed that Cersei's children were fathered not 의해 Robert but 의해 her brother Jaime. Before he could reveal this, Lysa poisoned him to stop him from sending their son Robert Arryn away as a ward.
Jon Arryn is a fictional character in the A Song of Ice and 불, 화재 series 의해 George R. R. Martin.