BENDITH Y MAMAU

[Folklore] The Bendith Y Mamau ("The Mothers' Blessing") is a rather unpleasant clan of Welsh fairies. They are ugly creatures, and sometimes regarded as the result of interbreeding between goblins and fairies. They steal children and substitute them for their own ugly ones, called Crimbils. Through the intervention of a witch, the parents can regain the stolen child, who will remember nothing of its time with the Bendith Y Mamau, except for a vague recollection of sweet music.