The Collaborative International Dictionary of English v.0.48:

Benedict \Ben"e*dict\, Benedick \Ben"e*dick\, n. [From Benedick,
   one of the characters in Shakespeare's play of "Much Ado
   about Nothing."]
   A married man, or a man newly married.
   [1913 Webster]

WordNet (r) 3.0 (2006):

benedick
    n 1: a newly married man (especially one who has long been a
         bachelor) [syn: benedick, benedict]