Several Early Welsh saga poems, known collectively but rather misleadingly as Canu Llywarch Hen ("The Poetry of Llywarch Hen"), survive that describe this Brythonic/early Welsh kingdom, however they were probably not composed until some time after the events alluded to and are to some degree mythologised.
Llywelyn traced his ancestry to Sandde, a different son of Llywarch Hen from that claimed by the kings of Gwynedd and Deheubarth.
Merfyn claimed descent from Llywarch Hen through him, and the royal pedigree in Jesus College MS. 20 says that Gwriad was the son of Elidyr, who bears the same name as his ancestor, the father of Llywarch Hen, Elidyr lydanwyn.
hen | Red Hen Press | Llywarch Hen | Hen Harrier | Ng Eng Hen | Llywarch ap Hyfaidd | Hen Wlad Fy Nhadau | Hen Ogledd | Dyfnwal Hen | The Wise Little Hen | The Little Red Hen | Leafie, A Hen into the Wild | Koko ga Hen da yo Nihonjin | Hen harrier | Hen%C3%A5n | Hen and chicks | fat hen | ''Falcon: Hen Kestrel'' by William Lewin, before 1790. Yale Center for British Art | Cornish game hen |