Meaning of the Sanskrit Word: kimpurusaih

  kimpuruṣaiḥ—by the Kimpuruṣas    SB 4.6.31
  kimpuruṣaiḥ—the inhabitants of the tract of land known as Kimpuruṣa    SB 5.19.1

Can't find any compound Sanskrit words containing kimpurusaih.