From A Wiki of Ice and Fire
Lord of Bitterbridge|
Defender of the Fords
|Book(s)||A Dance with Dragons (mentioned)|
Old Lord Caswell was Lord of Bitterbridge when his son, Lorent, took a longsword made by the castle's armorer for his own son, Rolly. After taking revenge by wounding Lorent, Rolly fled the Reach for the exiles of the Golden Company.