Dictionary of Welsh Biography

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GWILYM ap SEFNYN ( fl. c. 1440 ), poet ;

no details of his life remain, but it appears that he was of North Wales . Much of his poetry has been preserved in manuscripts, and this includes cywyddau addressed to Gwilym ap Gruffydd of Penrhyn and his son, Wiliam Gruffydd Fychan ; one vaticinatory cywydd ( N.L.W. MS. 6499 (370) ); and a number of englynion . Two more personal cywyddau are found, one being a religious confession and the other an elegy written upon the death (of the plague ) of the poet 's seven sons and three daughters.


  • Jones and Lewis , Mynegai i Farddoniaeth y Llawysgrifau (1928) ;
  • 'Dictionary of Welsh Biography.' 27 vols., N.L.W. MSS. 9251–77 ;
  • Cymru yn hanesyddol, parthedegol, a bywgraphyddol (1875) ;
  • Enwogion Cymru. A Biographical Dictionary of Eminent Welshmen (1852) ;
  • Gweirydd ap Rhys , Hanes Llenyddiaeth Gymreig, 1300–1650 (1885) ;
  • William Owen Pughe , The Cambrian Biography (1803) .


Ray Looker, (Mrs Ray Morgan), Cardiff / Rhymni

[ Gwilym ap Sefnyn was certainly of Llandygai . His name appears as witness to deeds in 1415 and 1417 — Penrhyn MSS. 221 and 311-2 in U.C.N.W. Library .


Professor Glyn Roberts, M.A., (1904-1962), Bangor

Published date: 1959