The Annales Cambri record the death of "Catgualart filius Catguolaum" in 682, killed in battle (-[Rome 20 May 689]).
The Annales Menevensis record that "Cadwalladrus rex Britanni" sent "Ivor filium suum" with 12 ships "ad regendas Britonum reliquias" in 689, and that he died in Rome "XII Kal Mai" in 689.
[The Gwentian Chronicle provides a different version of events when it records that "[the] daughter [of Cynan Tindaethwy king of all Wales] who was his heir married a chieftain of the name of Mervyn the Freckled", a later passage adding that "Mervyn the Freckled and Essyllt his wife began to reign over Gwynedd and Powys" in 818.] It is impossible to judge which version is preferable.
[The Gwentian Chronicle records that "Rhodri Molwynawc was made king over the Britons" in 720 and that "a great war arose between him and the Saxons, during which the Britons won two battles honourably".
The Gwentian Chronicle records that "Rhodri Molwynawc" died in 750 after reigning for 30 years and "was buried at Caerleon on the Uskthe last of the race of the kings of the island of Britain who was buried there". [The Gwentian Chronicle records that "the kingdom of Mona and the kingdom of Dyved [were] impoverished on account of the war between Hywel Vychan and his brother Cynan, in which Hywel conquered Mona" in 810 (-[816/17]). [The Gwentian Chronicle records that "the kingdom of Mona and the kingdom of Dyved [were] impoverished on account of the war between Hywel Vychan and his brother Cynan, in which Hywel conquered Mona" in 810.
The wide elapse of time suggests that the king whose death is reported in 814 could not have been the same person as the one whose accession is reported in 754, or else the earlier report is misdated.] 4. The same source records the succession of "Cynan Tindaethwy" in 754.
The wide elapse of time suggests that the king whose death is reported in 814 could not have been the same person or the earlier report is misdated.] .
Dating of early medieval Welsh history is a particular problem as the three main sources referred to above rarely coincide in the dates which they attribute to the events recorded. [The Gwentian Chronicle records that "Gwgan son of Morydd son of Llywarch Llwyd, king of Ceredigion was drowned in crossing the river Llychwr in Gower, to drive the black pagans out of that country" in 870.
Bede records that "Caedualla rex Brettonum", helped by "Pendade region genere Merciorum", rebelled against Eadwine King of Northumbria who was killed in battle "IV Id Oct" in 633 at "Haethfelth", adding that the rebels continued to govern the country with varying success for 22 years.
While the surviving sources are consistent regarding the parentage of Ethyll, they are contradictory regarding the identity of her husband.
The mid-10th century Harleian Manuscript genealogy names the ancestors of Rhodri "Mawr/the Great": "Rotri map Mermin map Etthil merch Cinnan".
Roger of Wendover records that the mother of "rex Britonum Cadwallo Cadwaladrus filius eiusjuvenem" was "soror Pend regis Merciorum" whom Cadwallon married after his alliance with King Penda ap Cadwallon "Fendigard/the Blessed" (-killed in battle 682).
[The Gwentian Chronicle records that "Cadwallawn son of Cadvan king of the Britons" died in 660 (dating seriously awry) and was succeeded by "his son Cadwalader the Blessed".] After his father's death, the throne of Gwynedd was usurped by Cadafael ap Cynfedw, who was deposed in 654 by Cadwaladr who then succeeded as King of Gwynedd.
The so-called "Gwentian Chronicle" represents another version of the Chronicle of the Princes/Brut y Tywysogion, allegedly arranged by Caradoc of Llancarvan, with major differences in the text and particular emphasis on southern Wales.