Source : Webster's Revised Unabridged Dictionary (1913)

Bairn \Bairn\, n. [Scot. bairn, AS. bearn, fr. beran to bear;
   akin to Icel., OS., &Goth. barn. See {Bear} to support.]
   A child. [Scot. & Prov. Eng.]

         Has he not well provided for the bairn ! --Beau. & Fl.

Source : WordNet®

bairn
     n : a child: son or daughter