Iolo Morganwg

“ On account of this armed expedition, the tribe of the Cambrians became so deficient in armed men, that the Irish Picts invaded them; and therefore Vortigern was forced to invite the Saxons to expel the invasion. And the Saxons, observing the weakness of the Cambrians, treacherously turned their arms against them, and by combining with the Irish Picts and other traitors, they took possession of the lands of the Cambrians, and also their privileges and their crown. ”

“ He took away with him 63,000 effective men, and steeds for war. At the end of the third age the Cambrians drove the Scandinavians over the sea into Germany. The second were the troops of Ganval the Irishman, who came into Gwynedd and settled there for twenty nine years, until they were driven into the sea by Caswallawn son of Beli, son of Mynogan. The third were the Caesareans, who continued by violence on this Island more than four hundred years, when they returned to Italy to oppose the fierce contention of the black invasion; and they did not return again to the Island of Britain. ”

“ The Romans who were in Britain went into Italy, and left only women and little children behind them; and, therefore, the Britons were so weakened, that they were not able to oppose invasion and conquest for want of men and strength.
The second was Vortigern, who murdered Constantine the Blessed, seized the crown of the island by violence and lawlessness, first invited the Saxons to the Island as his defenders, married Alis Ronwen, the daughter of Hengist, and gave the crown of Britain to the son he had by her, whose name was Gotta ”

“ After this she proceeded to Arvon, and deposited a grain of rye in Lleyn; and therefore the best rye is raised in Lleyn and Eivionydd. Upon the skirt of Rhiwgyverthwch she deposited a wolf’s cub and a young eaglet, and Coll gave the eagle to Brynach the Irishman, and he gave the wolf to Menwaed lord of Arllechwedd ”