After Hubert de Burgh’s death, the Three Castles fell to royal hands, and in 1254 Henry III granted them to his eldest son, the future King Edward I.
Ar ôl marwolaeth Hubert de Burgh, aeth y Tri Chastell i ddwylo brenhinol, ac yn 1254 penderfynodd Harri'r III eu rhoi i'w fab hynaf, y darpar Frenin Edward I.