Meaning of the Sanskrit Word: yayoh

  yayoḥ—in both of which (rivers)    SB 4.6.25, SB 4.6.26
  yayoḥ—of which two    SB 3.29.35
  yayoḥ—by whom    SB 4.1.13
  yayoḥ—both of whom (Nara and Nārāyaṇa)    SB 4.1.53

Can't find any compound Sanskrit words containing yayoh.