The Gwentian Chronicle records the division of territories effected by "Rhodri the Great" and that "Cadell his eldest son had Ceredigion and his palace at Dinevwr…[with] the supremacy to the oldest of the three diademed princes".
King of Ceredigion. The Gwentian Chronicle records that "Cadell son of Rhodri subjugated his brother Mervyn and took Powys from him, and then ruled over all Wales" in 877. The Gwentian Chronicle records that "Anarawd king of Gwynedd devastated Ceredigion, the territory of his brother Cadell" in 892.
Cadell succeeded as King of South Wales [Deheubarth], bordered by the Irish Sea, the Severn and the rivers Wye and Dovey, with his residence at Dinevawr on the river Towy in Carmarthenshire. Gerald of Wales´s Descriptio Kambriæ records that “Rothericus magnus, qui Britannice Rotheri Maur dicebatur” had “tres filios...Mervinum, Anaraut et Cadelh” who divided Wales between them, “Mervino...Nortwallia, Anaraut Powisia, Cadelh...Sudwallia”, and adds that Cadell acquired the whole of Wales after the death of his brothers. Bridgeman records that Cadell´s kingdom at first approximately corresponded to the 19th century Welsh counties of Cardigan, Pembroke, Carmarthen, Glamorgan, Monmouth and Brecknock.
The Annales Cambriæ record the death in 909 of "Catell filius Rodri rex". The Chronicle of the Princes of Wales records the death in 907 of "Cadell son of Rhodri". The Gwentian Chronicle records that "Cadell son of Rhodri the Great" died in 900. 1
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"The third son, Cadell, would have inherited scattered manors throughout those lands now ruled by his brothers, if he held any lordship at all we do not know where..." 2
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Cadell was one of the sons of Rhodri the Great, and his inheritance was the southern part of his father's principality, namely Seisyllwg ( Ceredigion and Ystrad Tywi ). He bequeathed this to his two sons Hywel and Clydog , and on the latter's death in the year 920 Hywel took possession of the whole. 3
General Notes: