The sobriquet of a psychoanalytic patient of Sigmund Freud, derived from a dream he had about white wolves that were perching in a tree.

According to psychoanalytic urban legend, he was a wealthy Russian and eventually lost all of his money and property in the 1917 revolution. He stayed on in Vienna, where the psychoanalytic community supported him financially, out of reverence for his association with Freud.

Other famous case studies by Freud:

  • Anna O.
  • The Rat Man
  • Dora
  • Little Hans
  • Dr. Schreber