What is "tomyris"

Tomyris (; from Eastern Iranian: تهم‌رییش Tahm-Rayiš), also called Thomyris, Tomris, Tomiride, or Queen Tomiri, was a Massagetean ruler who reigned over the Massagetae, a Scythian pastoral-nomadic confederation of Central Asia east of the Caspian Sea, in parts of modern-day Turkmenistan, Afghanistan, western Uzbekistan, and southern Kazakhstan. Tomyris led her armies to defend against an attack by Cyrus the Great of the Achaemenid Empire, and defeated and killed him in 530 BC (although this is debatable since Herodotus mentions that this was only one of many stories relating Cyrus the Great's death).

Tomyris is mentioned by several ancient writers, among whom the first is Herodotus. She is also mentioned by Strabo, Polyaenus, Cassiodorus, and Jordanes.