Gwydion's magical powers are abundantly illustrated in the tale. At Pryderi's court he changes fungus into horses and dogs, and afterwards slays Pryderi by power of enchantments; he produces a fleet by magic before Arianrhod's castle; with Math's help he forms Blodeuwedd out of flowers; he gives Llew his natural shape when he finds him as a wasted eagle on a tree, his flesh and the worms breeding in it dropping from him; he transforms the faithless Blodeuwedd into an owl. Some of these and other deeds are referred to in the Taliesin poems, while Taliesin describes himself as enchanted by Gwydion.317 In the Triads he is one of the three great astrologers of Prydein, and this emphasis laid on his powers of divination is significant when it is considered that his name may be derived from a root vet, giving words meaning "saying" or "poetry," while cognate words are Irish fáith, "a prophet" or "poet," German wuth, "rage," and the name of Odinn.318 The name is suggestive of the ecstasy of inspiration producing prophetic and poetic utterance. In the Mabinogion he is a mighty bard, and in a poem, he, under the name of Gweir, is imprisoned in the Other-world, and there becomes a bard, thus receiving inspiration from the gods' land.319 He is the ideal fáith—diviner, prophet, and poet, and thus the god of those professing these arts. Strabo describes how the Celtic vates (fáith) was also a philosopher, and this character is given in a poem to Seon (probably = Gwydion), whose artists are poets and magicians.320 But he is also a culture-god, bringing swine to men from the gods' land. For though Pryderi is described as a mortal who has himself received the swine from Annwfn (Elysium), there is no doubt that he himself was a lord of Annwfn, and it was probably on account of Gwydion's theft from Annwfn that he, as Gweir, was imprisoned there "through the messenger of Pwyll and Pryderi."321 A raid is here made directly on the god's land for the benefit of men, and it is unsuccessful, but in the Mabinogi a different version of the raid is told. Perhaps Gwydion also brought kine from Annwfn, since he is called one of the three herds of Britain,322 while he himself may once have been an animal god, then an anthropomorphic deity associated with animals. Thus in the Mabinogi, when Gwydion flees with the swine, he rests each night at a place one of the syllables of which is Moch, "swine"—an ætiological myth explaining why places which were once sites of the cult of a swine-god, afterwards worshipped as Gwydion, were so called.
Gwydion has also a tricky, fraudulent character in the Mabinogi, and although "in his life there was counsel," yet he had a "vicious muse."323 It is also implied that he is lover of his sister Arianrhod and father of Dylan and Llew—the mythic reflections of a time when such unions, perhaps only in royal houses, were permissible. Instances occur in Irish tales, and Arthur was also his sister's lover.324 In later belief Gwydion was associated with the stars; and the Milky Way was called Caer Gwydion. Across it he had chased the faithless Blodeuwedd.325 Professor Rh^ys equates him with Odinn, and regards both as representing an older Celto-Teutonic hero, though many of the alleged similarities in their respective mythologies are not too obvious.326
Amæthon the good is described in Kulhwych as the only husbandman who could till or dress a certain piece of land, though Kulhwych will not be able to force him or to make him follow him.327 This, together with the name Amæthon, from Cymric amæth, "labourer" or "ploughman," throws some light on his functions.328 He was a god associated with agriculture, either as one who made waste places fruitful, or possibly as an anthropomorphic corn divinity. But elsewhere his taking a roebuck and a whelp, and in a Triad, a lapwing from Arawn, king of Annwfn, led to the battle of Godeu, in which he fought Arawn, aided by Gwydion, who vanquished one of Arawn's warriors, Bran, by discovering his name.329 Amæthon, who brings useful animals from the gods' land, plays the same part as Gwydion, bringer of the swine. The dog and deer are frequent representatives of the corn-spirit, of which Amæthon may have been an anthropomorphic form, or they, with the lapwing, may have been earlier worshipful animals, associated with Amæthon as his symbols, while later myth told how he had procured them from Annwfn.
The divine functions of Llew Llaw Gyffes are hardly apparent in the Mabinogi. The incident of Blodeuwedd's unfaithfulness is simply that of the Märchen formula of the treacherous wife who discovers the secret of her husband's life, and thus puts him at her lover's mercy.330 But since Llew is not slain, but changes to eagle form, this unusual ending may mean that he was once a bird divinity, the eagle later becoming his symbol. Some myth must have told of his death, or he was afterwards regarded as a mortal who died, for a poem mentions his tomb, and adds, "he was a man who never gave justice to any one." Dr. Skene suggests that truth, not justice, is here meant, and finds in this a reference to Llew's disguises.331 Professor Rh^ys, for reasons not held convincing by M. Loth, holds that Llew, "lion," was a misapprehension for his true name Lleu, interpreted by him "light."332 This meaning he also gives to Lug, equating Lug and Llew, and regarding both as sun-gods. He also equates Llaw Gyffes, "steady or strong hand," with Lug's epithet Lám fada, "long hand," suggesting that gyffes may have meant "long," although it was Llew's steadiness of hand in shooting which earned him the title.333 Again, Llew's rapid growth need not make him the sun, for this was a privilege of many heroes who had no connection with the sun. Llew's unfortunate matrimonial affairs are also regarded as a sun myth. Blodeuwedd is a dawn goddess dividing her love between the sun-god and the prince of darkness. Llew as the sun is overcome by the latter, but is restored by the culture-hero Gwydion, who slays the dark rival. The transformation of Blodeuwedd into an owl means that the Dawn has become the Dusk.334 As we have seen, all this is a Märchen formula with no mythical significance. Evidence of the precariousness of such an interpretation is furnished from the similar interpretation of the story of Curoi's wife, Blathnat, whose lover Cúchulainn slew Curoi.335 Here a supposed sun-god is the treacherous villain who kills a dark divinity, husband of a dawn goddess.
If Llew is a sun-god, the equivalent of Lug, it is curious that he is never connected with the August festival in Wales which corresponds to Lugnasad in Ireland. There may be some support to the theory which makes him a sun-god in a Triad where he is one of the three ruddroawc who cause a year's sterility wherever they set their feet, though in this Arthur excels them, for he causes seven years' sterility!336 Does this point to the scorching of vegetation