From A Wiki of Ice and Fire
|Full name||Cerion Lannister|
|Title||King of the Rock|
|Book||The World of Ice & Fire (mentioned)|
Cerion Lannister was a King of the Rock of House Lannister of Casterly Rock. He extended the rule of the Kingdom of the Rock as far east as the Golden Tooth and its surrounding hills, defeating three lesser kings when they made an alliance against him.
- ↑ The World of Ice & Fire, The Westerlands.