Florinda Donner (originally Regine Margarita Thal, later Florinda Donner-Grau) is an American writer and anthropologist known as one of Carlos Castaneda's "witches" (the term for three women who were friends of Castaneda).
She studied anthropology at UCLA but did not complete her degree, letting her graduate studies lapse in 1977, after having advanced to doctoral candidacy.
While studying she met Castaneda and worked with him on developing his thinking.
In addition to working on Castaneda's books, she has written several books about indigenous healing, sorcery and lucid dreaming.