US Popularity Rank: 11237

Origin: Irish

Meaning: Slender, fair

Keelyn is a girl’s name of Irish origin. It’s an Anglicized version of the Irish name Caoilfhionn, which combines the words caoil (slender) with fionn (fair.) It’s often shortened to Keely. Keelyn offers an alternative spelling for Caoilfhionn that English speakers may find easier to spell and pronounce. Whichever spelling you choose, this beautiful name will make baby sound like they came straight out of a Celtic myth.