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Ogma: In Irish-Celtic myth, Ogma is the god of eloquence and learning. He is the son of the goddess Danu and the god Dagda, and one of the foremost members of the Tuatha Dé Danann. He is the reputed inventor of the ancient Ogham alphabet which is used in the earliest Irish writings. In the final battle at Mag Tuireadh he managed to take away the sword of the king of the Fomorians, but had to pay with his life for this feat. His Celtic equivalent is Ogmios.

Ogmios (Ogmios Sun-Face): The Celtic patron god of scholars and personification of eloquence and persuasiveness. It is he who invented the runic language of the Druids. Ogmius escorts souls on their journey to the after-live. He is represented as an old man, with a bald head, and dressed in a lion skin. His attributes are a bow and stick. He was worshipped in Gaul (Celtic France). His Irish counterpart is Ogma.

Ogyruan: The Celtic god of bards. Father of Gwenhwyar.

Olwen: Olwen ("white track", probably for flowers that blossomed under her feet) was the daughter of the Ysbaddaden, a monstrous figure whose life depended on keeping his daughter. She was a beautiful woman of high degree. When she married, her father's power (and life) was transferred to her husband.

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Pryderi: Pryderi ("worry") was the son of Pwyll of Dyfed and Rhiannon, a woman of the otherworld. He was kidnapped at his birth, rescued by Teirnon, and restored to his parents. He grew to manhood in seven years. He married Cigva and reigned in Dyfed after his father's death. He invited his mother's second husband, Manawydan, son of Llyr, to live in Dyfed after their marriage. One day, all of Dyfed turned into a wasteland, and only Rhiannon, Manawydan, Pryderi, and his wife Cigfa, were spared. Manawydan and Pryderi out hunting followed an enormous white boar into a caer, where Pryderi saw a golden bowl; when he touched it, he was enspelled. Rhiannon went after him and fell under the same spell; the caer then vanished, taking them with it. Manawydan and Cigva eventually captured a mouse which was really the wife of Llwyd, an enemy of Rhiannon's, and the spells were lifted. Dyfed was restored, and Pryderi ruled for many years.

Pwyll: Pwyll, lord of Dyfed, encountered while hunting a strange pack of hounds, pure white except for their red ears. Beating them off their prey, he set his own pack upon them, an act for which he was chided by their owner, who turned out to be Arawn, King of Annwn (the Underworld). Arawn laid upon Pwyll the following penance: he would live in Arawn's place, disguised, for a year and a day, while Arawn lived in his place in Dyfed. At the end of the time, he would do battle with Arawn's enemy, Hafgan, and defeat him, for only a mortal man could so do. Pwyll not only fulfilled this task, but refrained from sleeping with Arawn's wife; as reward, Arawn became his dear friend. Later, Pwyll met Rhiannon, daughter of Hefeydd the Old. She appeared to Pwyll, lord of Dyfed, as a beautiful woman in dazzling gold on a white horse. Pwyll sent his fastest horsmen after her, but could not catch her. On the third day, he spoke and she told him she wanted to marry instead of her espoused husband Gwawl. Pywll met her in a year and a day at the court of her father, where through her aid he won her from Gwawl. She bore Pwyll a son, who vanished. Her women killed a puppy and smeared its blood on her, to avoid blame at the child's loss. As punishment, Rhiannon spent seven years telling her story to all comers and bearing them, like a horse, to the court. The child, meanwhile, turned up at the court of Teyrnon, whose mares foaled on May eve and lost the foals mysteriously. When Teirnonkept watch, he saved a foal from a mysterious beast and also discovered, outside the stable, a child, whom he and his wife adopted. Then child grew to young manhood in seven years, and was given the foal rescued on the night he was found. Teirnonrecognised the child as the son of Pwyll and returned him to his family, where he was named Pryderi ("worry") by his mother. Pwyll reigned happily afterwards until his death.