She may be the same lady who, according to Old Welsh pedigrees, married King Dunod who is generally thought to have ruled in the West Riding of Yorkshire.
[This quote needs a citation] Nennius praises him amongst the earliest Welsh poets or Cynfeirdd, a contemporary of Talhaearn, Taliesin, Bluchbardd and Cian.
References to Aneirin are found in the work of the Poets of the Princes (Beirdd y Tywysogion), but his fame declined in the later Middle Ages until the re-assertion of Welsh identity by antiquarian writers of the Tudor period.
One stanza contains what may possibly be the earliest reference to King Arthur, as a paragon of bravery with whom one fallen warrior is compared – the identification is, however, conjectural.
The poem tells us that Aneirin was present at this battle and, having been taken prisoner, was one of only two or four Brittonic survivors; he remained a captive until his ransom was paid by Ceneu ap Llywarch Hen.