David Iii, Welsh Prince
DAVID III, WELSH PRINCE (d. 1283) was a son of Gruffydd and thus a nephew of David II. His life was mainly spent in fighting against his brother, the reigning prince, Llewelyn ab Gruffydd. His first revolt took place in 1254 or 1255, and after a second about eight years later he took refuge in England, returning to Wales when Henry III. made peace with Llewelyn in 1 267. Then about 1 274 the same process was repeated. David attended Edward I. during the Welsh expedition of 1277, receiving from the English king lands in North Wales; but in 1282 he made peace with Llewelyn and suddenly attacked the English garrisons, a proceeding which led to Edward's final conquest of Wales. After Llewelyn's death in December 1282 David maintained the last struggle of the Welsh for independence. All his efforts, however, were vain; in June 1283 he was betrayed to Edward, was tried by a special court and sentenced to death, and was executed with great barbarity at Shrewsbury in October 1283. As the last native prince of Wales, David's praises have been sung by the Welsh bards, but his character was not attractive, and a Welsh historian says " his life was the bane of Wales."
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)