Several important Welsh poets of the period spent time at the abbey including Gutun Owain, Tudur Aled and Guto'r Glyn.
A great-grandson of Hywel ap Siencyn, he copied an important manuscript of cywyddau (British Library Additional MS 14866) which includes several poems to the Ynysymaengwyn family (amongst them the poem by Tudur Aled mentioned above).