Danu, mother of the race, was considered as a daughter of Dagda. She seems to have been an Earth-Mother.
The Tuatha de Danann, or Tribe of the Goddess Danu, have many congeners in British myth, and their worship appears to have been brought from Gaul or Britain. They were conquered by the Milesians and, retiring to the Underworld, appear to have taken the place of fairies, for they are later called _sidhe_ or 'fairy folk.' Dagda (the 'good hand' or 'good god'), father of Danu, played the spring season into being with his harp. He fed the whole earth out of an immense pot or cauldron called Undry, the symbol of plenty. His was the perfection of knowledge and understanding. He is undoubtedly the great Celtic god of growth, and was probably originally a sun-deity, as his harp and his wisdom show, Ængus, his son, who supplanted him, resembled him. Nuada of the Silver Hand is a culture-hero and a cunning craftsman. He has a British equivalent, Llud Llaw Ereint, the 'silver-handed,' and both, like all culture-heroes, were connected with the sun and with growth. Manannan is a sea-god, and the Isle of Man may perhaps have taken its name from him when it was regarded as an Elysium. He is the same as the British Manawyddan. Lug (Welsh _Lieu_) is a craftsman and inventor of many arts, and is frequently alluded to as 'Lug of the Long Arm'; whence some authorities have seen in him a solar god, as the beams or arms of the sun reach from heaven to earth.
Ogma is master of poetry and the supposed inventor of the 'ogham' script, which is said to be called after him. His eloquence excited the gods to valour in battle. Diancecht ('swift in power') was a god of the healing art. Goibniu, a god of smith-craft and magic, manufactured arms for the gods and brewed ale for them. Brigit was a goddess of poetry and wisdom, and, like the Greek Pallas Athene, may have been at one time the goddess of a cult especially female. The Morrigan, Naman, and Macha are war-goddesses of sanguinary character.
Among purely British gods, Bran, son of Llyr, the sea-god, presided over minstrelsy, and may have been a god of the fertile Underworld or the realm of the dead, the Celtic Elysium. Gwydion, also a bard, is a diviner as well, and, like the Greek Proteus, is expert at changing his form. Amaethon appears to have been an agricultural deity, and the name seems to be connected with _amaeth_, the Welsh for 'plough-man.' He is credited with bringing certain domestic animals from the Land of the Gods to the World of Men, and this suggests totemism. Arianrhod, wife and sister of Gwydion, is perhaps an earth-goddess, but her significance is obscure. Bilé is probably a sun-god, and is equated with Apollo. Keridwen is a goddess dwelling in an under-water Elysium. She is described as a goddess of inspiration and poetry, and possesses a cauldron which is the source of all inspiration. Her son Avaggdu was cursed with hideousness, so his mother resolved to boil the cauldron of inspiration to compensate him for his ugliness. Gwion Bach, requested to watch it until it boils, steals the gift of inspiration for himself. He flees, and is pursued by Keridwen, but changes into various shapes. She follows his example, and at length in the form of a hen she swallows him as a grain of wheat. She later gives birth to him, throws him into the sea, and he becomes the bard Taliesin, famous for his poetic fire, the gift of the cauldron of inspiration.