The Collaborative International Dictionary of English v.0.48:

Nee \Nee\ (n[asl]), p. p., fem. [F., fr. L. nata, fem. of natus,
   p. p. of nasci to be born. See Nation.]
   Born; -- a term sometimes used in introducing the name of the
   family to which a married woman belongs by birth (i.e. her
   maiden name); as, Madame de Stael, n['e]e Necker.
   [1913 Webster]

WordNet (r) 3.0 (2006):

nee
    adj 1: (meaning literally `born') used to indicate the maiden or
           family name of a married woman; "Hillary Clinton nee
           Rodham"