Keyumars is a legendary figure from Iranian mythical history, appearing in the Shahnameh and the Avesta. The name is the modern Persian form of Middle Persian Kayomart, ultimately from Avestan Gaiio Marətan meaning "mortal life". The Avestan etymology derives from gaiia "life" and marəta "mortal, human".Mythological RoleIn Zoroastrian cosmology, Keyumars (as Gayōmart) is the mythological first human being. According to the Avesta, he was the first person to worship Ahura Mazda. Some texts depict him as neither male nor female, while later traditions (including Ferdowsi's Shahnameh) portray him as the first king of the world and the founder of the Pishdadian dynasty. He is also called Pēšdād, "the first to practice justice," a lawgiver. His reign marked the beginning of civilization in Iranian myth.Despite his singular role, the Avesta also has a separate tradition of first human parents, Mashya and Mashyana, whose names derive from the same root marətan "mortal". This duality can lead to interpretive differences across sources.Cultural SignificanceKeyumars remains a central figure in Iranian cultural memory, invoked in poetry (particularly the Shahnameh) and in the naming tradition as a symbol of primordial justice. The name is exclusively Persian in usage and is considered both ancient and enduringly popular among Persian speakers.Key FactsMeaning: "mortal life"Origin: Avestan → Middle Persian → New PersianType: Mythology, first human/kingUsage: Persian