The Collaborative International Dictionary of English v.0.48:

Pau \Pau\, n.
   See Pah.
   [1913 Webster]

Easton's 1897 Bible Dictionary:

Pau
   (Gen. 36:39) or Pai (1 Chr. 1:50), bleating, an Edomitish city
   ruled over by Hadar.


Hitchcock's Bible Names Dictionary (late 1800's):

Pau, same as Pai