fairy godmother

from WordNet (r) 3.0 (2006)

fairy godmother
    n 1: a generous benefactor
    2: a female character in some fairy stories who has magical
       powers and can bring unexpected good fortune to the hero or
       heroine

from Moby Thesaurus II by Grady Ward, 1.0

66 Moby Thesaurus words for "fairy godmother":
      Maecenas, Santa Claus, almoner, almsgiver, ancestral spirits,
      angel, assignor, attendant godling, awarder, backer, bestower,
      cheerful giver, conferrer, consignor, contributor, control, daemon,
      demon, donator, donor, familiar, familiar spirit, feoffor,
      financer, funder, genius, genius domus, genius loci, giver,
      good angel, good genius, grantor, guardian, guardian angel,
      guardian spirit, guide, household gods, imparter, invisible helper,
      lady bountiful, lares and penates, lares compitales,
      lares familiaris, lares permarini, lares praestites, lares viales,
      manes, ministering angel, numen, patron, patroness, penates,
      philanthropist, presenter, settler, special providence, subscriber,
      sugar daddy, supporter, testate, testator, testatrix, totem,
      tutelar god, tutelary, vouchsafer