Slender or fair
Keileigh is a modern phonetic spelling of the Irish name Kayley or Ceilidh. It is derived from the Gaelic word 'caol' meaning slender, or associated with the traditional social gathering known as a ceilidh.
Less common today
Keileigh isn't in the latest US Top 1000. It last peaked at #6,506 in 2012.
US births per 5-year period, 1990βpresent (SSA data).