Meaning of the Sanskrit Word: yasyah

  yasyāḥ—of whom    SB 10.8.46, Madhya 8.77, Antya 7.34
  yasyāḥ—of the goddess of fortune    SB 3.16.7
  yasyāḥ—of me    SB 8.16.13
  yasyāḥ—of whom (Pūtanā)    SB 10.6.37-38

Can't find any compound Sanskrit words containing yasyah.