More on Igrayne from Infoplease:

• Igrayne - Igrayne (See Igerna.) Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 Related ...
• Igerna, - Igerna, or Igerne Igrayne. Wife of Gorlois, Duke of Tintagel, in Cornwall, and mother of King ...
• Morgan le Fay, Morgaine la Fee - Morgan le Fay, Morgaine la Fee or Morgana the Fairy. Daughter of Queen Igrayne, and half-sister of ...
• Dictionary of Phrase and Fable: I - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "I"