A Persian name meaning 'universe' or 'world,' combining elements evoking cosmic kingship.
Kaihan — also romanized as Kayhan or Keyhân — is a Persian name of ancient and resonant meaning. Derived from the Middle Persian *kayân* and ultimately from the Avestan *kavi*, the name carries the meaning of 'universe,' 'world,' or 'cosmos.' It is connected to the legendary *Kayanian* dynasty of Persian mythology — the heroic royal lineage celebrated in Ferdowsi's epic *Shahnameh* ('Book of Kings'), where figures like Key Khosrow and Kay Kāvus embody the virtues of divine kingship, justice, and heroic struggle.
To bear a name rooted in *kay* is to carry a whisper of that ancient royal tradition. In Persian literary and philosophical tradition, the cosmos (*kayhan*) is not a cold astronomical concept but a living, interconnected whole — a universe suffused with meaning and animated by the divine *farr* (royal glory). Naming a child Kaihan is thus an act of cosmological optimism, a wish that the child might be as vast and encompassing as the world itself.
The name appears in classical Persian poetry and has been in continuous use across Iran, Afghanistan, and the broader Persian-speaking world for centuries. It is also the name of the influential Iranian newspaper *Kayhan*, founded in 1942, which has shaped Persian-language journalism and public discourse. In contemporary usage, Kaihan is primarily masculine and used throughout Iran, the Afghan diaspora, and Persian-speaking communities worldwide. Its appeal has grown beyond the Persian world as parents in multilingual households seek names that are phonetically accessible, carry genuine cultural depth, and offer the child a connection to one of humanity's oldest continuous literary traditions.