Dictionary of Welsh Biography

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DEIO ap IEUAN DU ( fl. 1460-1480 ), poet .

He himself states that his home was in Creuddyn , Ceredigion , and he is referred to in some manuscripts as ‘ Deio Du of Penadeiniol .’ He sang eulogies to the noble families of Glamorgan , Ceredigion , Meirionnydd , and Denbighshire . The most interesting of his patrons was Gruffydd Fychan of Cors-y-gedol (see the article Vaughan of Cors-y-gedol ), one of Jasper Tudor 's most ardent supporters in the years 1460-8 . Deio ap Ieuan Du is the author of the line ‘ y ddraig goch ddyry cychwyn ,’ which occurs in a cywydd to request the gift of a bull from Siôn ap Rhys of Glyn Nedd . Deio 's poetry is in the highly accomplished style characteristic of the mid-15th cent. poets .


  • Gorchestion Beirdd Cymru (1773, 1864) , 1773 , 168-88;
  • Jones and Lewis , Mynegai i Farddoniaeth y Llawysgrifau (1928) , 1928 .


Sir Thomas Parry, D.Litt., (1904-85), Bangor / Aberystwyth

Published date: 1959