The Collaborative International Dictionary of English v.0.48:

Commissionnaire \Com*mis`sion*naire"\ (?; F. ?), n. [F., fr. L.
   commissio.]
   1. An agent or factor; a commission merchant.
      [1913 Webster]

   2. One of a class of attendants, in some European cities, who
      perform miscellaneous services for travelers.
      [1913 Webster]