The Collaborative International Dictionary of English v.0.48:

Raconteur \Ra`con`teur"\ (r[.a]`k[^o]N`t[~e]r"), n. [F.]
   A relater; a storyteller.
   [1913 Webster]

WordNet (r) 3.0 (2006):

raconteur
    n 1: a person skilled in telling anecdotes [syn: anecdotist,
         raconteur]