Cath Palug indigenous to Wales
Cath Palug (also Cath Paluc, Cath Balug, Cath Balwg, literally 'Palug's cat') was a monstrous cat in Welsh legend, given birth in Gwynedd by the pig Henwen of Cornwall; the cat was later to haunt the Isle of Anglesey, and was said to have killed 180 warriors when Sir Kay went to the island to hunt it down.
Cath Palug's French name is Chapalu (Old French and variant modern forms: Capalu, Capalus). Vicious poems were composed by Frenchmen claiming it killed King Arthur, according to a 12th-century Anglo-Norman author. A cat analogous to Chapalu (though not mentioned by name) is eradicated by Arthur in the Vulgate Cycle's prose Estoire de Merlin.Triads
Cath Palug's birth origins are given in "The Powerful Swineherds" in the Welsh Triads (Trioedd Ynys Prydain, end of the 13th century).
According to this source, it started life as a black kitten (lit "whelp"), given birth by the great white sow Henwen at the black rock in Llanfair. There the kitten was cast into the sea, but it crossed the Menai Strait and was found on Ynys Môn (Angelsey), where the sons of Palug raised it, not realizing Cath Palug was to become one of the three great plagues of the island.
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