Called Nodens by the Romans, was the Celtic god of Healing.  He had a large shrine at Lydney in Gloucesterhire, where the devoted made offerings of small bronze representations of their deseased limbs.  He was sometimes identified with the protective Mars or the regenerative Silvanus and his companion and symbol was the dog: a deerhound whose lick could cure the afflicted.  An old story explains his connection with amputees.  At one time, Lludd was the leader of the gods, but he was wounded in battle and lost his hand.  Gorfannon, the divine-smith, made him a new one out of Silver, but he was still forced to abdicate in favour of his nephew, Lleu Llaw Gyffes.  Later, Lludd was troubled by a constant scream that was heard the eve of every Beltane.  He traveled to Gaul, where his brother Llefelys, was particularly worshipped, to ask his advice.  He explained that the cry was made by two fighting dragons.  Lludd managed to capture the creatures and imprisoned them deep below Dinas Emrys.  Lludd may have been particularly worshipped in London, which was said to have been named after him.