Kaelynn is a modern American name that combines Kay, a short form of Katherine meaning "pure", with Lynn, from the Welsh llyn, "lake". It is one of many spellings of Kaylin and Kaelyn that spread in the 2000s. Kaelynn entered the US top 1000 in 2009, peaked at number 909 in 2012 and has drifted back to number 2310 in 2025.