LLEWELYN II  ., AB GRUFFYDD (d. r282), prince of North Wales, succeeded his uncle David in 1246, but was compelled by Henry III. to confine himself to Snowdon and Anglesey . In 1254 Henry granted Prince Edward the royal lands in Wales . The steady encroachment of royal officers on Llewelyn's land began immediately, and in X256 Llewelyn declared war . The Barons' War engaged all the forces of England, and he was able to make himself lord of south and north Wales . Llewelyn also assisted the barons . By the treaty of Shrewsbury (1265) he was recognized as overlord of Wales; and in return Simon de Montfort was supplied with Welsh troops for his last campaign . Llewelyn refused to do homage to Edward I., who therefore attacked him in 1276 . He was besieged in the Snowdon mountains till hunger made him surrender, and conclude the humiliating treaty of Conway (1277) . He was released, but in 1282 he revolted again, and was killed in a skirmish with the Mortimers, near Builth in central Wales . See C . Bemont, Simon de Montfort (Paris, 1884) ; T . F .

Tout in the

Political History of England, iii . (1905); J . E . Morris in The Welsh Wars of Edward I . (1901) .