Dictionary of National Biography, 1885-1900/Lewis Morganwg
LEWIS Morganwg, i.e. of Glamorganshire (fl. 1500–1540), Welsh bard, was the son of another bard named Rhys Llwyd ab Rhys ab Rhicert (fl. 1450–1490), otherwise known as the Old Grey Bard of Glamorgan, who lived at Blaen Cynllan in that county. The son Lewis presided at the Session or Gorsedd of Glamorgan Bards in 1520. A poem written by him on St. Iltutus [see Illtyd or Iltutus], entitled ‘Cowydd St. Illtyd,’ is printed with an English translation in the Iolo MSS., and several of his compositions are still preserved among the Addit. MSS. in the British Museum (Nos. 14866, &c.). He is also said to have written a history of the three provinces of Wales, but nothing is now known of this work.
[Jones's Welsh Bards, p. 87; Williams's Eminent Welshmen, p. 346; Iolo MSS.]