The bulk of this work praises King Urien of Rheged and his son Owain mab Urien, although several of the poems indicate that he also served as the court bard to King Brochfael Ysgithrog of Powys and his successor Cynan Garwyn, either before or during his time at Urien's court.
A maior parte desta obra loa o rei Urien de Rheged e o seu fillo Owain mab Urien, aínda que varios dos poemas indican que tamén serviu como bardo da corte do rei Brochfael Ysgithrog de Powys e o seu sucesor Cynan Garwyn, quer antes quer durante o súa permanencia na corte de Urien.