The Collaborative International Dictionary of English v.0.48:

Ferryman \Fer"ry*man\, n.; pl. Ferrymen.
   One who maintains or attends a ferry.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ferryman
    n 1: a man who operates a ferry

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "ferryman":
   bargee, bargeman, barger, boat-handler, boater, boatman, boatsman,
   ferrier, galley slave, gondolier, lighterman, oar, oarsman, punter,
   rower, waterman, yachter, yachtsman



Bouvier's Law Dictionary, Revised 6th Ed (1856):

FERRYMAN. One employed in taking persons across a river or other stream, in
boats or other contrivances at a ferry. The owner of a ferry is not
considered a ferryman, when it is rented and in the possession of a tenant.
Minor, R. 366.
     2. Ferrymen are considered as common carriers, and are therefore the
legal judges to decide when it is proper to pass over or not. 1 M'Cord, R.
444 Id. 157 1 N. & M. 19; 2 N. & M. 17. They are to regulate how the
property to be taken across shall be put in their boats or flats; 1 M'Cord
157; and as soon as the carriage is fairly on the drop or slip of a fat,
although driven by the owner's servant, it is in possession of the ferryman,
and he is answerable. 1 M'Cord's R. 439.