Ffernfael ab Idwal or Ithel (died c. 775) was a late 8th-century king of Gwent in southeast Wales.
[1] His father was Idwal or Ithel ap Morgan, king of Glywyssing, Gwent, and Ergyng.
His father may have divided the kingdom among his sons, with Rhys receiving Glywyssing[2] and Ffernfael, much of Gwent.
[4] Ffernfael's death is recorded by the undated Annals of Wales.
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