The Collaborative International Dictionary of English v.0.48:

Dutchman \Dutch"man\, n.; pl. Dutchmen.
   A native, or one of the people, of Holland.
   [1913 Webster]

   Dutchman's laudanum (Bot.), a West Indian passion flower
      (Passiflora Murucuja); also, its fruit.

   Dutchman's pipe (Bot.), .
      [1913 Webster] Dutchman's breeches

WordNet (r) 3.0 (2006):

Dutchman
    n 1: a native or inhabitant of Holland [syn: Netherlander,
         Dutchman, Hollander]