The Collaborative International Dictionary of English v.0.48:

Jung \Jung\ prop. n.
   Carl Gustav Jung, a noted Swiss psychiatrist and
   Psychologist(1875-1961).

   Syn: Carl Jung, Carl Gustav Jung.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Jung
    n 1: Swiss psychologist (1875-1961) [syn: Jung, Carl Jung,
         Carl Gustav Jung]