Likely a modern combination or variant meaning 'born of fire'
Keyun is a rare contemporary name. It is often interpreted as a variant of the Gaelic name Keon or Cian, meaning 'ancient,' or as a modern American invention blending sounds from names like Kevin and Shaun. In some African American naming traditions, it is used as a unique rhythmic creation without a singular historical root.
Fewer than 5 boys were named Keyun in 2025.
US births per 5-year period, 1990–present (SSA data).