Wikipedia
Cyrtian
The Cyrtians or Kyrtians (gr. Κύρτιοι Kýrtioi, lat. Cyrtii) was an ancient Median tribe in historic Persia.
According to Rüdiger Schmitt, a tribe dwelling mainly in the mountains of Atropatenian Media together with the Cadusii, Amardi (or “Mardi”), Tapyri, and others (Strabo 11.13.3). Strabo characterized the Cyrtians living in Persia as migrants and predatory brigands.
In the Hellenistic period they seem to have been in demand as slingers, for they fought as such for the Median satrap Molon in his revolt against King Antiochus III in 220 BC.