Jon may refer to:
- Jon Arryn - Lord of the Eyrie, Warden of the East, and Hand of the King to Robert I Baratheon.
- Jon Connington - Exiled lord of Griffin's Roost and former Hand of the King to Aerys II Targaryen.
- Jon Florent - A knight of House Florent during the reign of King Daeron II Targaryen.
- Jon Mooton - Lord of Maidenpool during the War of Conquest.
- Jon Myre - Ironborn raider and supporter of Euron Greyjoy.
- Jon Roxton - A supporter of King Aegon II Targaryen during the Dance of the Dragons.
- Jon Snow - Bastard son of Lord Eddard Stark. Later Lord Commander of the Night's Watch.
Jonothor may refer to:
- Jonothor Darry - A knight of the Kingsguard of Aerys II Targaryen.