Keyumars

Keyumars (Persian: کیومرث) is the Modern Persian form of the name Gayō Marətan (or Gayōmard or Gayōmart, in later Zoroastrian texts) the Avestan name of the mythological First Man in world. The corresponding name in Middle Persian is Kayōmart.

In Ferdowsi's Shahnameh he appears as the first shāh of the world. He is also called the pishdād (پيشداد) thus the first man who practiced justice, the lawgiver.