Her divine child was known as Mabon the Enchanter, which in turn simply means ‘son’ or ‘son of the Mother’.
She is thought to be the prototype of the Arthurian Morgan Le Fay, though some Welsh sources makes her the mother of a daughter named Morfudd, and a son named Owain (Ywaine), the son of Urien of Rheged. She may also be the origin of the Lady of the Lake.
Evelake | The Legend of King Arthur
Culhwch and Olwen | Late 11th century
Breudwyt Rhonabwy | 13th century