Description of Wales
By G. Cambrensis
Public Domain Books
Genealogy of the Princes of Wales
The following is the generation of princes of South Wales: Rhys, son of Gruffydd; Gruffydd, son of Rhys; Rhys, son of Tewdwr; Tewdwr, son of Eineon; Eineon, son of Owen; Owen, son of Howel Dda, or Howel the Good; Howel, son of Cadell, son of Roderic the Great. Thus the princes of South Wales derived their origin from Cadell, son of Roderic the Great. The princes of North Wales descended from Mervin in this manner: Llewelyn, son of Iorwerth; Iorwerth, son of Owen; Owen, son of Gruffydd; Gruffydd, son of Conan; Conan, son of Iago; Iago, son of Edoual; Edoual, son of Meyric; Meyric, son of Anarawt (Anandhrec); Anarawt, son of Mervin, son of Roderic the Great. Anarawt leaving no issue, the princes of Powys have their own particular descent.
It is worthy of remark, that the Welsh bards and singers, or reciters, have the genealogies of the aforesaid princes, written in the Welsh language, in their ancient and authentic books; and also retain them in their memory from Roderic the Great to B.M.; (8) and from thence to Sylvius, Ascanius, and AEneas; and from the latter produce the genealogical series in a lineal descent, even to Adam.
But as an account of such long and remote genealogies may appear to many persons trifling rather than historical, we have purposely omitted them in our compendium.