Little fire or slender
Keyen is a modern variant likely derived from the Irish name Cian, meaning ancient, or the Gaelic name Keegan, meaning little fire. It may also be influenced by the name Ken, meaning handsome or born of fire. Its usage is contemporary and reflects a trend of creating unique phonetic variations of traditional Celtic names.
Less common today
Keyen isn't in the latest US Top 1000. It last peaked at #8,809 in 2008.
US births per 5-year period, 1990βpresent (SSA data).