Marged Haycock catalogues various forms of the name in the early texts,[1] and in less detail in her edition of the Taliesin poems.
The variant forms ‘fen’, ‘uen’ and ‘ven’ are all due to variant scribal practices in the spelling of the sound in the modern letter ‘v’, as is the letter ‘w’, which was also sometimes used for this sound,[3] causing the final syllable to be confused with ‘wen’ as a mutated form of Gwen (fair, blessed) a common ending to Welsh names.
[4] Sir Ifor Williams [5] asserted that ‘Cyrridfen’ is the most likely original form from ‘cwrr’ (bent, angled), so ‘woman with a crooked back’, fitting the stereotype of a witch.
Marged Haycock accepts ‘ben’ but questions the first syllable as ‘cyr’, suggesting other possible alternatives which could relate to ‘crynu’ (shake or shiver), or ‘craid’ (passionate, fierce, powerful), but also notes her daughter Creirwy, with the first syllable a form of ‘credu’ (belief) and so, by analogy, her mother’s name as Credidfen would mean ‘woman to be believed in’, making the mother’s and daughter’s name stems a pair.
[6] This story is first attested in a sixteenth-century manuscript written by Elis Gruffydd who claimed that it was widely known in Wales at that time in both written versions and in oral lore[7] The story tells that Ceridwen's son, Morfran (also called Afagddu), was hideously ugly – particularly compared with his beautiful sister Creirwy – so Ceridwen sought to make him wise in compensation.
She made a potion in her magical cauldron to grant the gift of wisdom and poetic inspiration, also called Awen.
She set Morda, a blind man, to tend the fire beneath the cauldron, while Gwion Bach, a young boy, stirred the concoction.
The child did not die, but was rescued on a Welsh shore – near Aberdyfi according to most versions of the tale – by a prince named Elffin ap Gwyddno; the reborn infant grew to become the legendary bard Taliesin.
Citing this and a couple of other examples, Hutton proposes that the Gogynfeirdd substantially created a new mythology not reflective of earlier paganism.
John Rhys in 1878 referred to the Solar Myth theory of Max Müller according to which "Gwenhwyfar and Ceridwen are dawn goddesses.