The conversation between human and AI assistant.
Who is Jon Arryn? What's his backstory?
Was Jon Arryn married, and did he have any children or heirs?
Yes, Jon Arryn was married to Lysa Tully, and they had one son named Robin Arryn. However, Robin was considered weak and sickly, so Jon took Robert Baratheon's two sons, Joffrey and Tommen, under his wing as his wards and potential heirs.