The Collaborative International Dictionary of English v.0.48:

Pigsney \Pigs"ney\, n. [Perh. a dim. of Dan. pige a girl, or Sw.
   piga; or from E. pig's eye.]
   A word of endearment for a girl or woman. [Obs.] [Written
   also pigsnie, pigsny, etc.] --Chaucer.
   [1913 Webster]