Meaning of the Sanskrit Word: rajarseh

  rajarseh—of great saintly kings    SB 4.21.28, SB 4.21.29, SB 4.21.28-29
  rajarseh—of the king who was a sage    SB 1.4.7
  rajarseh—of the great King Ambarisa    SB 9.4.14
  rajarseh—of the saintly king    SB 3.13.3
  rajarseh—of King Pariksit    SB 6.4.3
  rajarseh—of the King who was the rsi among the kings    SB 1.7.12

Can't find any compound Sanskrit words containing rajarseh.