Cerdd dafod

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Cerdd dafod (literally tongue craft) is the Welsh tradition of creating verse or poetry to a strict metre in the Welsh language.


The history of cerdd dafod can be traced to 6th century Welsh poets such as Aneirin and Taliesin, but is probably much older.[1] Studies also suggest that features of this form of poetry are comparable to the ancient Irish versificiations and therefore point to an older shared Celtic inheritance.[1] Cerdd dafod strictly follows the rules laid out in cynghanedd, a strict concept of sound-arrangement within one line, using stress, alliteration and internal-rhyme.[1]

One of the earliest texts on the subject is credited to Einion Offeiriad (fl c.1320-c.1349) a bard considered to have been under the patronage of Sir Rhys ap Gruffydd ap Hywel, a powerful nobleman of south-west Wales.[2][3] In it, he lists 24 canonical metres used for all poems in the writing of cerdd dafod. This was later revised by Dafydd ap Edmwnd who, in an eisteddfod held at Carmarthen circa 1450, changed two of the Offeiriad's metres to two more complicated versions of his own. These changes were adopted by future competitions as the preferred canon.[1]

In 1925 the Celtic linguist Sir John Morris-Jones published Cerdd Dafod, an in-depth study of the traditional metres of the cynghanedd and a text now seen as the definitive work on the topic.[4] This was brought about after his desire to see a return to traditional poetry and use of strict metre in eistedfoddau. The end of the twentieth century saw a renaissance in cerdd dafod, especially in the metres known as Englyn and Cywydd, attributed to the poet Alan Llwyd.[1]


  1. ^ a b c d e Islwyn, Dafydd (2006). Koch, John T., ed. Celtic Culture: A Historical Encyclopedia, Volumes 1-5. ABC CLIO. p. 392. ISBN 9781851094400. 
  2. ^ Williams, Griffith John. "Biography of Einion Offeiriad". National Library of Wales. Retrieved 26 July 2012. 
  3. ^ Davies (2008), p.754
  4. ^ Davies (2008), p.574