Petroc Baladrddellt (also known as Pedrog, or Pedrogl Paladrddellt) was a 7th-century King of Dumnonia (now the English West Country).
His death may have occurred in c. 652 when King Cenwalh of Wessex is said to have defeated the Britons at the battle of Bradford-on-Avon, taking large swathes of Dorset and Somerset.
[citation needed] Other sources are unclear as to whether this battle was civil war between Cenwalh and his kinsman Cuthred,[1] or against the Welsh or the Mercians or both.
If so, Prince Progmael appeared to have predeceased his father Clemen ap Bledric who died in c.654, at Y Ferwig in Ceredigion, leaving the Dumnonian kingdom to Culmin.
[5] In his Biographical Dictionary of Eminent Welshmen, Williams asserts that Petroc (Pedrogl Paladrddellt) is better known as the English translation of the name Lancelot du Lac of Arthurian Legend.