Cath Palug
Cath Palug (also Cath Paluc, Cath Balug, Cath Balwg, literally 'Palug's Cat') was a monstrous cat in Welsh mythology associated with Arthurian legend. Given birth to in Gwynedd by the pig Henwen of Cornwall, the cat was to haunt the Isle of Anglesey until Kay went to the island to hunt it down. Outside of Wales, the cat's opponent has been transposed to King Arthur himself or, occasionally, other legendary heroes such as Ogier the Dane. Cath Palug's name in French literature is Chapalu (Old French and variant modern forms: Capalu, Capalus).