The Collaborative International Dictionary of English v.0.48:

Bellman \Bell"man\, n.
   A man who rings a bell, especially to give notice of anything
   in the streets. Formerly, also, a night watchman who called
   the hours. --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bellman
    n 1: someone employed as an errand boy and luggage carrier
         around hotels [syn: bellboy, bellman, bellhop]