From A Wiki of Ice and Fire
|Book||The Mystery Knight (appears)|
Ser Clarence Charlton was a knight from House Charlton during the reign of King Aerys I Targaryen.
In 212 AC, Ser Clarence took part in the tourney held by Lord Ambrose Butterwell at his castle of Whitewalls to celebrate his second marriage to Lady Frey. He was soundly defeated in the lists by Ambrose's commander and son-in-law, Ser Tommard Heddle.