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.
Less common today
Keyun isn't in the latest US Top 1000. It last peaked at #7,429 in 2002.
US births per 5-year period, 1990βpresent (SSA data).