From A Wiki of Ice and Fire
Jon Cafferen was a knight from House Cafferen and the heir to Fawnton during the reign of King Aegon I Targaryen.
Ser Jon married Alys Oakheart, the daughter of the Lord of Old Oak, in 12 AC. During the wedding, Lord Wyl of Wyl turned up uninvited and was admitted through the postern gate by a treacherous servant. Lord Oakheart and most of the guests were slain, and Jon's wife was forced to watch him be castrated. His wife and her handmaids were gang-raped by Wyl's men and then sold off to a Myrish slaver. This was the most infamous act of the First Dornish War.
- ↑ 1.0 1.1 Fire & Blood, Reign of the Dragon - The Wars of King Aegon I.