|Title||Lord of Maidenpool|
|Allegiance|| House Mooton|
|Book(s)||The World of Ice & Fire (mentioned)|
Jon became Lord of Maidenpool when his brother was killed in combat against Aegon I Targaryen. Jon yielded Maidenpool to House Targaryen after the battle, becoming one of the first adversaries to join Aegon's cause. He commanded the Targaryen army during the Field of Fire, as Aegon took to the skies on Balerion.
- The World of Ice & Fire, The Reign of the Dragons: The Conquest.