From A Wiki of Ice and Fire
|Title||Lord of the Hellholt|
|Book||Fire & Blood (mentioned)|
After the death of Queen Rhaenys Targaryen, four successive Lords of the Hellholt were murdered, for the Iron Throne's ransom on the head of any Dornish lords. It is likely that Lord Uthor was the first of these lords.
- Fire & Blood, Reign of the Dragon - The Wars of King Aegon I.