Meaning of the Sanskrit Word: agastyah

  agastyaḥ—the great sage Agastya    SB 4.28.32
  agastyaḥ—Agastya    SB 6.18.5
  agastyaḥ—Agastya Muni    SB 8.4.11-12

Can't find any compound Sanskrit words containing agastyah.