The Collaborative International Dictionary of English v.0.48:

Welshman \Welsh"man\, n.; pl. Welshmen.
   [1913 Webster]
   1. A native or inhabitant of Wales; one of the Welsh.
      [1913 Webster]

   2. (Zool.)
      (a) A squirrel fish.
      (b) The large-mouthed black bass. See Black bass.
          [Southern U. S.]
          [1913 Webster]

WordNet (r) 3.0 (2006):

Welshman
    n 1: a native or resident of Wales [syn: Welshman, Welsh,
         Cambrian, Cymry]