Meaning of the Sanskrit Word: prthoh

  pṛthoḥ—of King Pṛthu    SB 4.16.3, SB 4.16.14, SB 4.19.2, SB 4.19.10, SB 4.19.32, SB 4.22.17, SB 4.23.31
  pṛthoḥ—that of Pṛthu    SB 3.1.22
  pṛthoḥ—King Pṛthu    SB 4.18.32

Can't find any compound Sanskrit words containing prthoh.