Iorwerth Fynglwyd can be regarded as the greatest of the Glamorgan cywyddwyr. He was master of the conventional eulogy as practised by the bards. What gives his work particular importance, however, is the gift for proverb-making which is so evident in his social poems — that gift of enclosing some truth or statement in a memorable couplet. This is seen in the cywyddau which he sang with the object of comforting Rhys ap Siôn of Aberpergwm when the latter had lost his patrimony for a period and had been obliged to become a fugitive. These cywyddau were among the most popular in Wales in the 16th cent., and quotations from them are given in John Davies's collection of notable lines from the works of the bards, in his Flores Poetarum Britannicorum (first published in 1710).
Iolo Morganwg sought to make Iorwerth Fynglwyd a famous stonemason, one of the ancestors of those alleged stonemasons, Richard and William Twrch, by whom, he maintained, the porch at Beaupré had been erected in 1600. These stories are repeated in 19th cent. books. They are, however, without foundation. All we have here is an attempt by Iolo to explain some lines in poems by Iorwerth Fynglwyd which he had seen.
Emeritus Professor Griffith John Williams, M.A., (1892-1963), Gwaelod-y-garth, Cardiff