|Title||Lord of Cerwyn|
|Born||In 285 AL|
|Died||In 299 AL, at Winterfell|
A Clash of Kings (Appears)|
A Storm of Swords (Mentioned)
A Clash of Kings
While his father Medger Cerwyn was a captive at Harrenhal, Cley attended the harvest feast at Winterfell in his place, bringing two dozen lances with him. He brought the news to Winterfell of Stannis Baratheon being a king now and of his letter concerning the illegitimacy of Cersei Lannister's children. During the harvest feast he danced with Beth Cassel.
When the ironmen attacked Torrhen's Square, Cley brought three hundred men as part of the relief force. Cley Cerwyn joined Ser Rodrik Cassel and marched to the relief of Winterfell. There the northern force was surprised by a Bolton force and scattered, Cley taking an arrow through the eye and dying.