Source : Webster's Revised Unabridged Dictionary (1913)

Impeople \Im*peo"ple\, v. t. [imp. & p. p. {Impeopled}; p. pr. &
   vb. n. {Impeopling}.] [See {Empeople}.]
   To people; to give a population to. [Obs.]

         Thou hast helped to impeople hell.       --Beaumont.