Cynan Dindaethwy ap Rhodri - Cynan Dindaethwy - was King of Gwynedd (798–816) in medieval north-west Wales, also called King of the Britons by the Annals of Ulster.
Cynan was son of Rhodri Molwynog ap Idwal and Margaret ferch Duplory and ascended to the throne of Gwynedd after first his father died and then his cousin Caradog ap Meirion, who had become king after Rhodri, died in 798.
Cynan Dindaethwy ap Rhodri was preceded by Caradog ap Meirion (c.754-c.798) and was succeeded by Hywel ap Rhodri Molwynog (814-825).
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