Meaning of the Sanskrit Word: manuna

  manunā—by the father of mankind    SB 2.7.2
  manunā—the would-be Vaivasvata Manu    SB 2.7.12
  manunā—and with Manu    SB 3.13.20
  manunā—by Manu    SB 5.1.21

Can't find any compound Sanskrit words containing manuna.